Dissertations / Theses: 'Life cycle cost analysis'

1

Petrovic, Bojana. "Life cycle assessment and life cycle cost analysis of a single-family house." Licentiate thesis, Högskolan i Gävle, Energisystem och byggnadsteknik, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:hig:diva-36901.

Full text

Abstract:

The building industry is responsible for 35% of final energy use and 38% of CO2 emissions at a global level. The European Union aims to reduce CO2 emissions in the building industry by up to 90% by the year 2050. Therefore, it is important to consider the environmental impacts buildings have. The purpose of this thesis was to investigate the environmental impacts and costs of a single-family house in Sweden. In the study, the life cycle assessment (LCA) and the life cycle cost (LCC) methods have been used by following the “cradle to grave” life cycle perspective. This study shows a significant reduction of global warming potential (GWP), primary energy (PE) use and costs when the lifespan of the house is shifted from 50 to 100 years. The findings illustrate a total decrease in LCA outcome, of GWP to 27% and PE to 18%. Considering the total LCC outcome, when the discount rate increases from 3% to 5% and then 7%, the total costs decrease significantly (60%, 85% to 95%). The embodied carbon, PE use and costs from the production stage/construction stage are significantly reduced, while the maintenance/replacement stage displays the opposite trend. Operational energy use, water consumption and end-of-life, however, remain largely unchanged. Furthermore, the findings emphasize the importance of using wood-based building materials due to its lower carbon-intensive manufacturing process compared to non-wood choices. The results of the LCA and LCC were systematically studied and are presented visually. Low carbon and cost-effective materials and installations have to be identified in the early stage of a building design so that the appropriate investment choices can be made that will reduce a building’s total environmental and economic impact in the long run. Findings from this thesis provide a greater understanding of the environmental and economic impacts that are relevant for decision-makers when building single-family houses.
Byggbranschen svarar för 35% av den slutliga energianvändningen och 38 % av koldioxidutsläppen på global nivå. Europeiska unionen strävar efter att minska koldioxidutsläppen i byggnadsindustrin med upp till 90% fram till 2050. Därför är det viktigt att beakta byggnaders miljöpåverkan. Syftet med denna avhandling var att undersöka miljöpåverkan och kostnader för ett enfamiljshus i Sverige. I studien har livscykelbedömningen (LCA) och livscykelkostnadsmetoderna (LCC) använts genom att tillämpa livscykelperspektivet ”vagga till grav”. Studien visar en stor minskning av global uppvärmningspotential (GWP), användning av primärenergi (PE) och kostnader vid växling från 50 till 100 års husets livslängd. Resultaten visar en årlig minskning med 27% för utsläpp av växthusgaser och med 18% för användningen av primärenergi. Med tanke på det totala LCC-utfallet, när diskonteringsräntan ökar från 3%, 5% till 7%, minskar de totala kostnaderna avsevärt (60%, 85% till 95%). Det noteras att klimatavtrycket, primärenergianvändningen och kostnaderna från produktionssteget/konstruktionssteget minskar avsevärt, medan underhålls- / utbytessteget visar den motsatta trenden när man byter från 50 till 100 års livslängd. Den operativa energianvändningen, vattenförbrukningen och avfallshanteringen är fortfarande nästan samma när man ändrar livslängden. Vidare betonar resultaten vikten av att använda träbaserade byggmaterial på grund av lägre klimatpåverkan från tillverkningsprocessen jämfört med alternativen. LCA- och LCC-resultaten studerades systematiskt och redovisades visuellt. De koldioxidsnåla och kostnadseffektiva materialen och installationerna måste identifieras i ett tidigt skede av en byggnadskonstruktion genom att välja lämpliga investeringsval som kommer att minska de totala miljö och ekonomiska effekterna på lång sikt. Resultaten från denna avhandling ger ökad förståelse för miljömässiga och ekonomiska konsekvenser som är relevanta för beslutsfattare vid byggnation av ett enfamiljshus.

APA, Harvard, Vancouver, ISO, and other styles

2

Yang, Shih-Hsien. "Effectivess of Using Geotextiles in Flexible Pavements: Life-Cycle Cost Analysis." Thesis, Virginia Tech, 2006. http://hdl.handle.net/10919/31442.

Full text

Abstract:

Using geotextiles in secondary roads to stabilize weak subgrades has been a well accepted practice over the past thirty years. However, from an economical point of view, a complete life cycle cost analysis (LCCA), which includes not only costs to agencies but also costs to users, is urgently needed to assess the benefits of using geotextile in secondary road flexible pavement. In this study, a comprehensive life cycle cost analysis framework was developed and used to quantify the initial and the future cost of 25 representative design alternatives. A 50 year analysis cycle was used to compute the cost-effectiveness ratio for the design methods. Four flexible pavement design features were selected to test the degree of influence of the frameâ s variables. The analysis evaluated these variables and examined their impact on the results. The study concludes that the cost effectiveness ratio from the two design methods shows that the lowest cost-effectiveness ratio using Al-Qadiâ s design method is 1.7 and the highest is 3.2. The average is 2.6. For Perkinsâ design method, the lowest value is 1.01 and the highest value is 5.7. The average is 2.1. The study also shows when user costs are considered, the greater TBR value may not result in the most effective life-cycle cost. Hence, for an optimum secondary road flexible pavement design with geotextile incorporated in the system, a life cycle cost analysis that includes user cost must be performed.
Master of Science

APA, Harvard, Vancouver, ISO, and other styles

3

Evdokimova, Tatiana. "Life cycle assessment in construction field: A life cycle cost analysis of reinforcement concrete bridge." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2014. http://amslaurea.unibo.it/7371/.

Full text

Abstract:

The present work is included in the context of the assessment of sustainability in the construction field and is aimed at estimating and analyzing life cycle cost of the existing reinforced concrete bridge “Viadotto delle Capre” during its entire life. This was accomplished by a comprehensive data collection and results evaluation. In detail, the economic analysis of the project is performed. The work has investigated possible design alternatives for maintenance/rehabilitation and end-of-life operations, when structural, functional, economic and also environmental requirements have to be fulfilled. In detail, the economic impact of different design options for the given reinforced concrete bridge have been assessed, whereupon the most economically, structurally and environmentally efficient scenario was chosen. The Integrated Life-Cycle Analysis procedure and Environmental Impact Assessment were also discussed in this work. The scope of this thesis is to illustrate that Life Cycle Cost analysis as part of Life Cycle Assessment approach could be effectively used to drive the design and management strategy of new and existing structures. The final objective of this contribution is to show how an economic analysis can influence decision-making in the definition of the most sustainable design alternatives. The designers can monitor the economic impact of different design strategies in order to identify the most appropriate option.

APA, Harvard, Vancouver, ISO, and other styles

4

Safi, Mohammed. "Bridge Life Cycle Cost Optimization : Analysis, Evaluation & Implementation." Thesis, KTH, Civil and Architectural Engineering, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-11908.

Full text

Abstract:

In infrastructure construction projects especially bridge investments, the most critical decisions that significantly affect the whole bridge LCC are the early stages decisions. Clearly, it's more beneficial to correctly choose the optimum bridge than to choose the optimum construction or repair method.

The ability of a bridge to provide service over time demands appropriate maintenance by the agency. Thus the investment decision should consider not only the initial activity that creates a public good, but also all future activities that will be required to keep that investment available to the public.

This research is aiming for bridge sustainability, enhance the bridge related decision making, and facilitate the usage of the bridge related feedbacks. The development of a reliable and usable computer tool for bridge LCC & LCA evaluation is the main target.

Toward the main goal, many steps were fulfilled. A unique integrated Bridge LCC evaluation methodology was developed. Two systematic evaluation ways were developed, one for bridge user cost and one for the bridge aesthetical and cultural value. To put these two systematic ways in practice, two preliminary computer programs were developed for this purpose. Today and future works are focusing on developing methodology and preliminary computer tool for bridge agency cost as well as the bridge LCA evaluation. KTH unique LCC evaluation system will enable the decision makers to correctly choose the optimum bridge in the early stages decision making phases as well as any later on reparation method.

ETSI

APA, Harvard, Vancouver, ISO, and other styles

5

Abed, El-Fattah Safi Mohammed. "Bridge Life Cycle Cost Optimization : Analysis, Evaluation, & Implementation." Thesis, KTH, Bro- och stålbyggnad, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-36944.

Full text

APA, Harvard, Vancouver, ISO, and other styles

6

Wilde, William James. "Life cycle cost analysis of Portland cement concrete pavements /." Digital version accessible at:, 1998. http://wwwlib.umi.com/cr/utexas/main.

Full text

APA, Harvard, Vancouver, ISO, and other styles

7

Chen, Chao, and Yogesh Vishwas Bhamare. "Life Cycle Cost Analysis and Optimization of Wastewater Pumping System." Thesis, KTH, Hållbar utveckling, miljövetenskap och teknik, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-255866.

Full text

Abstract:

Different attempts have been made to facilitate successful operation of Wastewater Pumping (WWP) system. The WWP units which are already existed in different parts of the world have been studied to identify its success, failure and different parameters associated with its suboptimal performance. The performance of WWP depends on three parameters namely pump, hydraulics, control system and pump station. These parameters are interdependent and must be carefully matched to achieve efficient WWP system. Nowadays the scenario has changed where organizations has started looking increasingly at the total cost of ownership, another way of saying Life Cycle Cost Analysis (LCCA) and recognizing the need to get most out of their equipment purchase. The master thesis includes theory part which describes the different parameters associated with WWP unit especially focusing on Xylems WWP system. This thesis is an attempt to help companies to know how LCCA could be productive management tool in order to minimize maintenance cost and maximize energy efficiency The study reported in this thesis work has been conducted to shed light over the use of Life Cycle Cost Analysis in WWP system. The current study tries to suggest and assess an adopted approach to ensure successful and efficient operation of WWP system with lowering energy demand and decrease in maintenance cost. Initial cost, Maintenance cost and Energy costs are important issues in the operation of WWP system since they are responsible for total cost over time. Therefore, description of each cost, formulas necessary for LCC calculations, data and survey structure, material and energy flow has been described. This work also aims to provide an extensive literature review, different survey and data collection techniques, analysis of collected data, statistical modelling, customer interaction by questionnaires and an interview with experts were used. LCC calculations were used to support the design and selection of most cost-efficient WWP system. Therefore, the given thesis work is an attempt to achieve better functional performance, improve existing design principles associated with WWP System, contribution to asses economic viability, support decision making to enhance operational quality to achieve efficient and successful WWP system.

APA, Harvard, Vancouver, ISO, and other styles

8

Trevino, Cantu Hector. "Life-Cycle Cost Analysis for Offshore Wind Farms:Reliability and Maintenance.O&M Cost Drivers Analysis." Thesis, Högskolan på Gotland, Institutionen för kultur, energi och miljö, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-217018.

Full text

Abstract:

Operations and maintenance (O&M) activities represent a significant share of the expenses during the lifetime of offshore wind farms. When compared to onshore wind farms, O&M costs are increased for the offshore case, as specialized vessels, weather windows and rough conditions mean more failures, downtime (decreasing availability), spare parts, and man-hours.This study comprises an analysis of the available O&M data from a selected offshore wind farm. The results and conclusions from this investigation could then be used to evaluate possible reliability improvements and compare options for the maintenance strategies, as well as to ponder the convenience of warranty periods and O&M agreements between wind farm operators and wind turbine manufacturers or O&M service providers.The life-cycle cost (LCC) concept is utilized in the analysis of the wind farm survey for this thesis. LCC analysis could be the starting point to make decisions regarding specific wind turbine models, as selecting the turbines with the lowest initial cost may not be necessarily the scenario which also costs the least amount of money when taking into consideration the whole life cycle. It may also be a great tool to forecast future operational incomes and expenses of offshore wind farms.

APA, Harvard, Vancouver, ISO, and other styles

9

White, Bradley A. "Improving life-cycle cost management in the U.S. Army : analysis of the U.S. Army and Commercial Businesses life-cycle cost management." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 2001. http://handle.dtic.mil/100.2/ADA397642.

Full text

APA, Harvard, Vancouver, ISO, and other styles

10

Tallapragada, Pavan K. "Mechanistic-based performance prediction and life cycle cost analysis tools." Cincinnati, Ohio : University of Cincinnati, 2005. http://www.ohiolink.edu/etd/view.cgi?acc%5Fnum=ucin1116271787.

Full text

APA, Harvard, Vancouver, ISO, and other styles

11

Salem, Ossama M. "Infrastructure construction and rehabilitation, risk-based life cycle cost analysis." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1999. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/nq39588.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

12

Guven, Zeynep. "Life cycle cost analysis of pavements : state-of-the-practive /." Connect to this title online, 2006. http://etd.lib.clemson.edu/documents/1175186260/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

13

Alborzfard, Nakisa. "Life Cycle Cost Analysis Framework of Green Features in Buildings." Digital WPI, 2011. https://digitalcommons.wpi.edu/etd-theses/10.

Full text

Abstract:

Sustainability has been heightened to a new level of importance, due to the current global race for commodities and conservation of our environment. Sustainable Buildings are of particular interest since buildings are significant contributors to consumption of resources. Since the inception of the United States Green Building Council (USGBC) in 1993, USGBC has played a key role in providing guidance to the design and construction community in building“green" structures. The Leadership in Energy and Environmental Design (LEED) rating system is an industry accepted standard for the design/construction and measurement of green buildings. Although USGBC provides guidance on performance measurement, a streamlined process of performance tracking and measurement has not been formalized. This research focuses on identifying vital areas of required tracking and measurement; to allow for a systematic analysis of costs and benefits, over the life of sustainable buildings. A case-study based on the recently designed and constructed East Hall LEED-Gold Certified, dormitory building at Worcester Polytechnic Institute (WPI), was undertaken to create and assess a life cycle costs analysis framework. This research is aimed at understanding what the costs of building green at WPI truly are. Life Cycle Cost Analyses of the mechanical, electrical, plumbing and roof components were evaluated to generate percent savings or percent added cost. This research reviewed the various green and non-green costs of construction, consumption, and operations and maintenance costs providing a comparative analysis to leading researchers in the field of costs and benefits of building green.

APA, Harvard, Vancouver, ISO, and other styles

14

Swei, Omar Abdullah. "Incorporating uncertainty in the Life Cycle Cost Analysis of pavements." Thesis, Massachusetts Institute of Technology, 2012. http://hdl.handle.net/1721.1/78541.

Full text

Abstract:

Thesis (S.M.)--Massachusetts Institute of Technology, Dept. of Civil and Environmental Engineering; and, (S.M.)--Massachusetts Institute of Technology, Engineering Systems Division, 2012.
Cataloged from PDF version of thesis.
Includes bibliographical references (p. 81-87).
Life Cycle Cost Analysis (LCCA) is an important tool to evaluate the economic performance of alternative investments for a given project. It considers the total cost to construct, maintain, and operate a pavement over its expected life-time. Inevitably, input parameters in an LCCA are subject to a high level of uncertainty, both in the short-term and long-term. Under its current implementation in the field, however, LCCA inputs are treated as static, deterministic values. Conducting such an analysis, although computationally simpler, hides the underlying uncertainty of the inputs by only considering a few possible permutations. This suggests that although computationally simpler, the answer from the analysis may not necessarily be the correct one. One methodology to account for uncertainty is to treat input parameters as probabilistic values, allowing the analysis to consider a range of possible outcomes. There are two major reasons as to why probabilistic LCCAs, although recommended, have not been streamlined into practice. First, the LCCA of construction projects is a large-scale problem with many input parameters with a high-level of uncertainty. Second, there is a significant gap in research that statistically quantifies uncertainty for input values. This research addresses the latter point by statistically quantifying four types of uncertainty: the unit cost of construction, quantity of material inputs, occurrence of maintenance activities, and a particular emphasis is placed upon characterizing the evolution of material prices over time. Having statistically characterized uncertainty in the LCCA analysis, the application of the probabilistically derived inputs is illustrated in three scenarios. Pavement alternative designs are derived for a set of traffic conditions in a given location. The results of the analysis indicate the integration of probabilistic input parameters in the LCCA process allows for more robust conclusions when evaluating alternative pavement designs. Additionally, the case study shows treating input parameters probabilistically could potentially alter the pavement selection, and one parameter that greatly influences this is material-specific price projections.
by Omar Abdullah Swei.
S.M.

APA, Harvard, Vancouver, ISO, and other styles

15

Sahirman, Sidharta. "Fiber reinforced polymer (FRP) bridge deck life-cycle cost analysis." Morgantown, W. Va. : [West Virginia University Libraries], 2009. http://hdl.handle.net/10450/10666.

Full text

Abstract:

Thesis (Ph. D.)--West Virginia University, 2009.
Title from document title page. Document formatted into pages; contains xii, 153 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 129-136).

APA, Harvard, Vancouver, ISO, and other styles

16

Al-Hajj, Assem Nazih. "Simple cost-significant models for total life-cycle costing in buildings." Thesis, University of Dundee, 1991. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.295224.

Full text

APA, Harvard, Vancouver, ISO, and other styles

17

Safi, Mohammed. "Life-Cycle Costing : Applications and Implementations in Bridge Investment and Management." Doctoral thesis, KTH, Bro- och stålbyggnad, 2013. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-133241.

Full text

Abstract:

A well-maintained bridge infrastructure is a fundamental necessity for a modern society that provides great value, but ensuring that it meets all the requirements sustainably and cost-effectively is challenging. Bridge investment and management decisions generally involve selection from multiple alternatives. All of the options may meet the functional demands, but their life-cycle cost (LCC), service life-span, user-cost, aesthetic merit and environmental impact may differ substantially. Thus, life-cycle analysis (LCCA, a widely used decision-support technique that enables comparison of the LCC of possible options), is essential. However, although LCCA has recognized potential for rationalizing bridge procurement and management decisions its use in this context is far from systematic and the integration of LCCA findings in decisions is often far from robust. Thus, the overall objective of the work underlying this thesis has been to contribute to the development of sustainable bridge infrastructures while optimizing use of taxpayers’ money, by robustly incorporating life-cycle considerations into bridge investment and management decision-making processes. The work has introduced a full scheme for applying LCCA throughout bridges’ entire life-cycle. Several practical case studies have been presented to illustrate how an agency could benefit from use of a bridge management system (BMS) to support decisions related to the management of existing bridges and procure new bridges. Further developments include a comprehensive approach incorporating a novel LCCA technique, “LCC Added-Value Analysis”, which enables procurement of the most cost-efficient bridge design through a fair design-build (D-B) tendering process. A further contribution is a novel, holistic approach designed to enable procurement of bridges with the maximal possible sustainability (life-cycle advantages) under D-B contracts. The approach combines LCC Added-Value analysis with other techniques that make bridges’ aesthetic merit and environmental impact commensurable using an adapted concept named the willingness-to-pay-extra (WTPE). The systematic analytical procedures and potential of LCCA to deliver major savings highlighted in this thesis clearly demonstrate both the feasibility and need to integrate LCCA into bridge procurement and management decisions. This need has been recognized by Trafikverket (the Swedish Transport Administration), which has implemented a software tool developed in the research (BaTMan-LCC) in its bridge and tunnel management system (BaTMan). This thesis introduces readers to the field, considers BaTMan and the bridge stock in Sweden, discusses the developments outlined above and obstacles hindering further implementation of LCCA, then presents proposals for further advances.

QC 20131029

APA, Harvard, Vancouver, ISO, and other styles

18

Dunn, William Colby. "A more comprehensive life cycle cost analysis of pavement materials alternatives." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/89965.

Full text

Abstract:

Thesis: S.B., Massachusetts Institute of Technology, Department of Materials Science and Engineering, June 2014.
Cataloged from PDF version of thesis. "May 2013."
Includes bibliographical references (pages 43-45).
Life Cycle Cost Analysis (LCCA) is a commonly used tool in analyzing the economic viability of highway construction investments. The initial and life-cycle materials costs associated with highway construction involve a high level of uncertainty and therefore warrant extensive and dynamic cost analysis. These uncertainties derive from extensive materials usage costs. Despite the advantages of implementing a probabilistic approach to cost analysis, many state departments of transportation (DOTs) continue to employ a deterministic model, thereby misjudging, and often altogether neglecting the underlying uncertainty and risks. The goals of this paper are twofold: first, to validate forecasting as a viable method to predict future materials' prices, and second, to explore economies of scale as a potential driver of uncertainty. The paper will then apply these results to a case study methodology, looking at a comparative LCCA of two materials alternative, asphalt vs. concrete pavement designs for two states: Florida and Colorado. Endeavoring in this light, the author has characterized uncertainty in a way that will be comprehensible by practitioners. This research has successfully validated out-of-sample forecasting as a superior method of forecasting materials prices, characterized uncertainty related to project quantity, and delivered results using a relatable case study approach.
by William Colby Dunn.
S.B.

APA, Harvard, Vancouver, ISO, and other styles

19

Smith, Jeffrey L. "LIFE-CYCLE COST ANALYSIS OF REINFORCED CONCRETE BRIDGES REHABILITATED WITH CFRP." UKnowledge, 2015. http://uknowledge.uky.edu/ce_etds/33.

Full text

Abstract:

The deterioration of highway bridges and structures and the cost of repairing, rehabilitating, or replacing deteriorated structures is a major issue for bridge owners. An aging infrastructure as well as the need to upgrade structural capacity for heavier trucks adds to problem. Life-cycle cost analysis (LCCA) is a useful tool for determining when the deployment of fiber-reinforced polymer (FRP) composite components is an economically viable alternative for rehabilitating deteriorated concrete bridges. The use of LCCA in bridge design and rehabilitation has been limited. The use of LCCA for bridges on a project level basis has often been limited to the non-routine design of major bridges where the life-cycle cost model is customized. LCCA has historically been deterministic. The deterministic analysis uses discrete values for inputs and is fairly simple and easy to do. It does not give any indication of risk, i.e. the probability that the input values used in the analysis and the resulting life-cycle cost will actually occur. Probabilistic analysis accounts for uncertainty and variability in input variables. It requires more effort than a deterministic analysis because probability distribution functions are required, random sampling is used, and a large number of iterations of the life-cycle cost calculations are carried out. The data needed is often not available. The significance of this study lies in its identification of the parameters that had the most influence on life-cycle costs of concrete bridge and how those parameters interacted. The parameters are: (1) Time to construct the new bridge; (2) traffic volume under bridge (when applicable); (3) value of time for cars; and (4) delay time under the bridge during new bridge construction (when applicable). Using these parameters the analyst can now “simulate” a probabilistic analysis by using the deterministic approach and reducing the number of iterations. This study also extended the use of LCCA to bridge rehabilitations and to bridges with low traffic volumes. A large number of bridges in the United States have low traffic volumes. For the highway bridge considered in the parametric study, rehabilitation using FRP had a lower life-cycle cost when compared to the new bridge alternative.

APA, Harvard, Vancouver, ISO, and other styles

20

Sooksmarn, Naroon. "A life-cycle cost analysis of a chromium recycling process system." Master's thesis, This resource online, 1995. http://scholar.lib.vt.edu/theses/available/etd-01262010-020216/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

21

Frustaci, Jordan Browne. "Life-Cycle Benefit-Cost Analysis of Safety Related Improvements on Roadways." BYU ScholarsArchive, 2016. https://scholarsarchive.byu.edu/etd/6109.

Full text

Abstract:

The Highway Safety Manual (HSM) lists four different methods for determining the change in crash frequency in order of reliability. Currently, the Utah Department of Transportation (UDOT) uses the fourth reliable method. The goal of this research was to develop a tool that the most reliable method mentioned in the HSM could be used to perform life-cycle benefit-cost analyses. A spreadsheet program was built that performs the HSM's Part C Predictive Method for 11 different roadway segment types mentioned in HSM using Excel macros and Visual Basic for Applications (VBA) programming. Intersections were not included in this spreadsheet program as they were not included in the Utah Crash Prediction Model (UCPM) or the Utah Crash Severity Model (UCSM) at the time of this research. The methodology for analysis was set up to become part of the use of the models in selecting countermeasures. The concept and spreadsheet layout are discussed using the rural two-lane two-way (TLTW) highway spreadsheet as an example. Three examples are presented in this thesis, which are a case of rural TLTW highway, a case of five-lane urban arterial with a two-way left-turn lane (TWLTL), and a case of a freeway segment, each with two selected countermeasures to compare their benefit-cost ratios (BCRs). One important aspect associated with life-cycle benefit-cost analysis of safety related improvements is the cost of countermeasures. The spreadsheets developed in this research can predict the benefits associated with a countermeasure following the methods found in the HSM; however, it does not include a module to estimate costs associated with a countermeasure to be selected because costs of countermeasures are dependent on the way such improvements are included in construction contracts. The engineer should seek guidance from the cost estimate expert within the agency or outside consultants when determining the project costs.

APA, Harvard, Vancouver, ISO, and other styles

22

Khurana, Mayank. "A Framework for Holistic Life Cycle Cost Analysis for Drinking Water Pipelines." Thesis, Virginia Tech, 2017. http://hdl.handle.net/10919/78357.

Full text

Abstract:

Life Cycle Cost Analysis (LCCA) forms an important part of asset management practices and provides an informed decision support. The holistic nature of LCCA includes life cycle assessment (LCA) as an important component alongside economic life cycle cost analysis. The drinking water industry is right now lacking a reliable cost data structure which will ensure that all the utilities capture the same set of cost data. Also, models and tools currently available in the academia and industry are purely deterministic in nature and do not cater to uncertainty in the data. This study provides a framework for a holistic life cycle cost analysis tool which will help drinking water utilities to prioritize the activities and optimize the cost spending of the utility. The methodology includes the development of a cost data structure, a life cycle cost analysis and a life cycle assessment model in the form of an excel spreadsheet. The LCCA model has the capability to compare different pipe materials, installation, condition assessment, rehabilitation and replacement technologies. Whereas, LCA model can compare different pipe materials based on greenhouse gas emissions calculations. The final step of the methodology includes piloting the model with data from utility A. The analysis has been shown in the form of three case studies - comparison of two pipe materials, two pipe installation technologies and two pipe rehabilitation technologies. The case studies provide results in the form of comparison of total life cycle costs for different alternatives and hence a better alternative can be chosen.
Master of Science

APA, Harvard, Vancouver, ISO, and other styles

23

Funk, David M. "Life cycle cost/cost-effectiveness analysis of U.S. Army Recruits : high quality versus low quality." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA292719.

Full text

Abstract:

Thesis (M.S. in Management) Naval Postgraduate School, December 1994.
Thesis advisor(s): Keebom Kang, Katsuaki L. Terasawa. "December 1994." Includes bibliographical references. Also available online.

APA, Harvard, Vancouver, ISO, and other styles

24

Jacobsen, Sofie. "The effectiveness of grouted macadam at intersections. : A life-cycle cost analysis." Thesis, KTH, Väg- och banteknik, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-101813.

Full text

Abstract:

Intersections often experience severe rutting in the asphalt concrete layers due to slow moving, high loads, acceleration, deceleration and turning. This thesis aims to investigate the effectiveness of grouted macadam, open graded asphalt with its voids filled with cement grout, as a pavement material at intersections. This was done by investigating the properties of grouted macadam through a literature review and performing a life-cycle cost analysis comparing grouted macadam and asphalt concrete as pavement materials at an intersection. Grouted macadam is found to be similar to asphalt concrete concerning the relation between stiffness and temperature and frequency as well as fatigue behaviour. The main differences are that grouted macadam is stiffer, stronger and not prone to rutting. Thus it would be suitable to address rutting problems. The main drawbacks are that construction demands extra time and precision and that it is expensive compared to asphalt concrete. The life-cycle cost analysis showed that assuming that the grouted macadam has a service life of twenty years and rehabilitation of the asphalt concrete in the form of mill and refill takes place every fourth year the life-cycle costs are approximately the same. A sensitivity analysis was performed that showed that local variations can have large impact on the life-cycle costs. The main conclusion is that grouted macadam can be effective as a pavement material at intersections that experiences severe rutting and frequently reoccurring rehabilitations.

APA, Harvard, Vancouver, ISO, and other styles

25

Munz, Beatrice C. (Beatrice Carol). "Cost analysis of product recovery process in single-use camera life cycle." Thesis, Massachusetts Institute of Technology, 1995. http://hdl.handle.net/1721.1/11473.

Full text

APA, Harvard, Vancouver, ISO, and other styles

26

Chen, Chen. "Soft Computing-based Life-Cycle Cost Analysis Tools for Transportation Infrastructure Management." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/28214.

Full text

Abstract:

Increasing demands, shrinking financial and human resources, and increased infrastructure deterioration have made the task of maintaining the infrastructure systems more challenging than ever before. Life-cycle cost analysis (LCCA) is an important tool for transportation infrastructure management, which is used extensively to support project level decisions, and is increasingly being applied to enhance network level analysis. However, traditional LCCA tools cannot practically and effectively utilize expert knowledge and handle ambiguous uncertainties. The main objective of this dissertation was to develop enhanced LCCA models using soft computing (mainly fuzzy logic) techniques. The proposed models use available "real-world" information to forecast life-cycle costs of competing maintenance and rehabilitation strategies and support infrastructure management decisions. A critical review of available soft computing techniques and their applications in infrastructure management suggested that these techniques provide appealing alternatives for supporting many of the infrastructure management functions. In particular, LCCA often utilizes information that is uncertain, ambiguous and incomplete, which is obtained from both existing databases and expert opinion. Consequently, fuzzy logic techniques were selected to enhance life-cycle cost analysis of transportation infrastructure investments because they provide a formal approach for the effective treatment of these types of information. The dissertation first proposes a fuzzy-logic-based decision-support model, whose inference rules can be customized according to agency's management policies and expert opinion. The feasibility and practicality of the proposed model is illustrated by its implementation in a life-cycle cost analysis algorithm for comparing and selecting pavement maintenance, rehabilitation and reconstruction (MR&R) policies. To enhance the traditional probabilistic LCCA model, the fuzzy-logic-based model is then incorporated into the risk analysis process. A fuzzy logic approach for determining the timing of pavement MR&R treatments in a probabilistic LCCA model for selecting pavement MR&R strategies is proposed. The proposed approach uses performance curves and fuzzy-logic triggering models to determine the most effective timing of pavement MR&R activities. The application of the approach in a case study demonstrates that the fuzzy-logic-based risk analysis model for LCCA can effectively produce results that are at least comparable to those of the benchmark methods while effectively considering some of the ambiguous uncertainty inherent to the process. Finally, the research establishes a systematic method to calibrate the fuzzy-logic based rehabilitation decision model using real cases extracted from the Long Term Pavement Performance (LTPP) database. By reinterpreting the model in the form of a neuro-fuzzy system, the calibration algorithm takes advantage of the learning capabilities of artificial neural networks for tuning the fuzzy membership functions and rules. The practicality of the method is demonstrated by successfully tuning the treatment selection model to distinguish between rehabilitation (light overlay) and do-nothing cases.
Ph. D.

APA, Harvard, Vancouver, ISO, and other styles

27

Malhotra, Vaibhav. "Life cycle cost analysis of a novel cooling and power gas turbine engine." [Gainesville, Fla.] : University of Florida, 2005. http://purl.fcla.edu/fcla/etd/UFE0011865.

Full text

APA, Harvard, Vancouver, ISO, and other styles

28

Farnum, Phillip H. "The high power device tester addition to CASS : a life cycle cost analysis." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1994. http://handle.dtic.mil/100.2/ADA282956.

Full text

APA, Harvard, Vancouver, ISO, and other styles

29

Rehan, Talal Yaser. "Analysis of Life-Cycle Cost, Properties, and Field Performance of Parking Lot Pavements." Thesis, Southern Illinois University at Edwardsville, 2016. http://pqdtopen.proquest.com/#viewpdf?dispub=10158413.

Full text

Abstract:

As population and traffic increase, improvements in the paving industry including roadways, parking lots, and sidewalks are desired. Pavements have a key effect on the quantity and quality of rainwater runoff and reserved ground water. More so, regulations towards constructing and paving these new areas are becoming stricter especially in urban areas where available land is becoming limited. Permeable pavements are more common than ever, and are a solution to rainwater runoff, recharging ground water, and reducing the costs associated with treating storm water.

Permeable pavements are available alternative to conventional pavements and are becoming more applicable and more widespread. Unlike conventional pavements, permeable pavements have major obstacles to acceptance and use since there is limited research on these types of pavements, with only a handful of guidelines and properties for users to follow.

This research incorporates two technical concepts on two topic areas. The first topic can be used to assist decision makers, planners, and owners in selecting their pavement type for their intended use by analyzing and comparing the life-cycle cost for four pavement types. Two of these are conventional impermeable pavements: Hot-Mix Asphalt and Portland Cement Concrete and two are permeable pavements: Porous Asphalt and Pervious Concrete. This first topic area will also summarize tables of advantages and limitations for each pavement type. The second topic area of this paper will help initiate guidelines on how to design, mix, batch, place, cure, and test pervious concrete.

APA, Harvard, Vancouver, ISO, and other styles

30

Singer, Tanyew. "Wooden Photovoltaic Module Frames : Proof of Concept, Life Cycle Assessment and Cost Analysis." Thesis, Uppsala universitet, Institutionen för geovetenskaper, 2021. http://urn.kb.se/resolve?urn=urn:nbn:se:uu:diva-454318.

Full text

Abstract:

To mitigate climate change and to achieve global carbon neutrality, the expansion of renewable energy sources is of paramount importance. In this context, photovoltaics (PV) are widely regarded as one of the most promising technologies to lead the transformation towards decarbonized energy systems. However, the manufacturing of PV systems is associated with initial greenhouse gas emissions linked to the procurement of PV components. Therefore, current research focuses on minimizing initial emissions to improve the overall environmental performance of PV systems. Since previous research suggests that conventional aluminum module frames contain a significant amount of embodied carbon, this study investigates a possible material substitution with wood as alternative frame material to lower the overall carbon footprint of PV modules. To test the technical feasibility of PV modules with wooden frames, a proof of concept (POC) is conducted using wood types that exhibit necessary characteristics regarding their mechanical properties and durability. Guided by the finite element method and preliminary testing, a novel frame design is conceived, and PV modules with wooden frames are realized. The prototypes are put to extensive testing, in which the mechanical stability is examined, and weathering effects are investigated in an outdoor installation. Furthermore, a life cycle assessment (LCA) is carried out to quantify potential benefits of wooden compared to aluminum frames regarding their global warming potential and other environmental impact categories. Lastly, this study compares the economic performance of wooden PV module frames with aluminum frames and considers possible optimizations in the value chain of wooden frames. POC results show that PV modules with wooden frames - in line with industrial standards - are feasible, yet mechanical stability and durability vary depending on the type of wood and overall design. LCA results suggest that wooden frames exhibit invariably better environmental performance in all impact categories although a reduced module lifetime may impair the overall life cycle performance. In regard to cost efficiency, wooden frames are more costly than aluminum frames, yet financial incentives or subsidies may make low-carbon materials more competitive in the future. It can be concluded that wooden PV module frames may be a promising alternative to standard aluminum frames provided that the overall lifetime is identical. Thus, additional studies are required to analyze the long-term performance and to identify areas of application for modules with wooden frames, for instance in the building-integrated PV sector. Lastly, further research is needed to explore additional utilizations of wood in PV systems such as in ground and roof mounting structures.

APA, Harvard, Vancouver, ISO, and other styles

31

ARGYRI, VASILIKI-ROUMPINI. "Life Cycle Cost Analysis for Turnouts : A comparison between straight and bent turnouts." Thesis, KTH, Transportplanering, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-283198.

Full text

Abstract:

In a world with unlimited travel options, railways play a key role in transportation. In order to serve the demand at a satisfactory level, it is important that the infrastructure quality remains high and safe. Maintenance is then the most important aspect of railway infrastructure. This project’s aim is to develop a tool that would evaluate the cost differences and maintenance needs during the life cycle of turnouts, bent with different radii to straight, as a crucial part of the infrastructure, not only technically but also financially. When the cost over a life cycle is provided then design decisions can get more efficient. Maintenance history of seven years of preventive and corrective maintenance data from databases Bessy and 0felia for single turnouts across the Swedish rail network were studied, analysed and evaluated. Along with information from interviews with key informants the cost driving parameters were specified. The calculator was developed in Microsoft Excel, giving results for bent turnouts in 4 different radii categories and the respective straight turnouts. An EV-UIC60-760-1:14 turnout was used as a case study for different radii categories and 3 different scenarios were run in order to test the robustness of the tool. The results showed that bent turnouts have a higher life cycle cost than straight in the order of 1 to 3 mkr depending on the radius, the bigger share of which is usually the preventive maintenance cost, with the specifics to vary between the categories and different scenarios tested. The way maintenance data are registered and classified plays an important role in the analysis.

APA, Harvard, Vancouver, ISO, and other styles

32

Brown, Colin Barrett. "Life-cycle Cost Analysis of Nutrient Reduction Technologies Employed in Municipal Wastewater Treatment." Oberlin College Honors Theses / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=oberlin1462979592.

Full text

APA, Harvard, Vancouver, ISO, and other styles

33

Harajli, Hassan A. "Cost-benefit analysis of microgenerators : an integrated appraisal perspective." Thesis, University of Bath, 2009. https://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.528171.

Full text

Abstract:

The UK domestic building sector accounts for a substantial amount of the final energy demand and greenhouse gas (GHG) emissions. To this extent, the sector can play an important role in GHG abatement and energy demand reduction, essential objectives of a more ‘sustainable energy system’. Microgeneration, or production of electricity or heat from small-scale sources, have been advocated by some, including the Supergen ‘Highly Distributed Power Systems Consortium’ to which this thesis contributes, as important means towards achieving these objectives. In this thesis, three assessed microgenerators; specifically a 600W microwind system, 2.1 kWp photovoltaic (PV) and building-integrated photovoltaic (BIPV) systems, and a 2.8m2 solar hot water (SHW) system have been analysed through an ‘integrated appraisal toolkit’ in order to assess their respective economic and financial performance in current UK context. A cost-benefit analysis (CBA) is applied, based on outputs and results from energy analysis and life-cycle assessment (LCA), and other tools such as financial appraisal, cost-effective analysis (CEA), and simple multi-attribute ranking technique (SMART) are also performed in order to asses how these systems perform on an individual household level or when compared to other energy technologies. The CBA, which included environmental impacts quantified through the LCA, obtained negative net present values (NPVs) for all the assessed microgenerators with the exception of microwind in a high-wind resourced ‘open’ area with lower end capital costs. The NPVs in the financial appraisal, which excluded environmental impacts, yielded relatively poorer results still. Only with the proposed feed-in tariffs would the systems all achieve positive NPVs. Given that the CBA included a substantial qualitative part, alternative tools, such as CEA and multi-criteria evaluation were applied (in brief) in order to place the assessed systems in the context of other energy generating sources in the UK, and to enable a more confident decision with respect to whether these systems should be advocated or rejected.

APA, Harvard, Vancouver, ISO, and other styles

34

Borer, Chris Joseph. "An analysis of the aircraft engine Component Improvement Program (CIP) a life cycle cost approach /." Thesis, Monterey, California : Naval Postgraduate School, 1990. http://handle.dtic.mil/100.2/ADA243346.

Full text

Abstract:

Thesis (M.S. in Science in Management)--Naval Postgraduate School, December 1990.
Thesis Advisor(s): Moore, Thomas P. Second Reader: Crawford, Alice. "December 1990." Description based on title screen as viewed on April 01, 2010. DTIC Descriptor(s): Aircraft engines, life cycle costs, maintenance, computerized simulation, organizations, costs, aircraft equipment, naval aircraft, reliability, theses, aircraft, cost effectiveness DTIC Identifier(s): Return on investment, engine Component Improvement Program(CIP) Author(s) subject terms: Aircraft engine cost; lifecycle cost; return on investment; engine Component Improvement Program (CIP) Includes bibliographical references (p. 111-113). Also available in print.

APA, Harvard, Vancouver, ISO, and other styles

35

Fakhoury, Bashar, and Heba Alhamed. "Life Cycle Cost Based Model For Successful Maintenance Outsourcing Process Case Study." Thesis, Växjö University, School of Technology and Design, 2008. http://urn.kb.se/resolve?urn=urn:nbn:se:vxu:diva-2200.

Full text

Abstract:

The main purpose of this thesis is to develop a new model which helps the decision maker to rationalize outsourcing decisions based on Life Cycle Cost (LCC) analysis and select the appropriate supplier. The model developed consists of four main phases, as well as a pre-evaluating step, which investigate the organization needs and circumstances. Phase I is an evaluation and calculation phase, it assess whether outsourcing is the right policy to be adopted as a competitive advantage from two perspectives; the strategic evaluation of the outsourcing decision, and the cost savings through the life time of the outsourcing process using LCC. Phase II is supplier's selection; it aims to select the preferred supplier using Multiple Criteria Decision Making (MCDM), as well as identifies performance measures to monitor supplier performance. Phase III is maintain and monitor phase, it aims to keep the process and the supplier under continuous revision and assessment. Phase IV is review phase, it aims to identify if a specified monitored parameter is out of control or at critical levels, and identify the causes. This model contribute in covering the lack in the literature by considering LCC in the outsourcing decision making, as well as providing a structured model that concern about the whole process starting by understanding the organizations need and ends by monitoring and review the outsourcing process.

The model was validated at one Swedish company, i.e. Kalmar Industries in Ljungby assembly unit, in particular, within the maintenance department. The results of the model validation shows that using LCCA, and risk benefits associated, the preferred alternative is to outsource all the maintenance activities related to ventilation system, these activates involve maintenance personnel, spare parts, and third party to monitor and report the process to authorities. Furthermore, based on LCCA and other suggested criteria and using MCDM, ABB Supplier got the lowest score in MCDM i.e. 36.70% (the lowest LCC along with fulfillment of the qualitative criteria).

The main result is that; it is possible to employ LCCA in the maintenance outsourcing process to achieve a strategic model valid for decisions taking over the life length of the process. Consequently, the main recommendation for the case company is to outsource these activities and to transfer it to ABB service supplier.

APA, Harvard, Vancouver, ISO, and other styles

36

Asiedu, Yaw. "Life-cycle cost analysis and probabilistic cost estimating in engineering design using an air duct design case study." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0033/NQ63835.pdf.

Full text

APA, Harvard, Vancouver, ISO, and other styles

37

De, Sanctis Clarissa. "Life Cycle Assessment Method for PVC production." Master's thesis, Alma Mater Studiorum - Università di Bologna, 2018.

Find full text

Abstract:

Partendo da un'analisi generale sull'importanza della plastica come materia prima a livello globale con le sue relative implicazioni ambientali e non, ci si è successivamente focalizzati sulla produzione del PVC. Si è applicata la metodologia "Life Cycle Assessment (LCA)" prendendo in considerazione tutti gli step necessari per la sintesi di un kilogrammo di PVC. L'utilizzo del GaBi software ha successivemente permesso di implemetare l'analisi ed ottenere risultati in termini di indici (eventualmente aggregati in indicatori), singoli valori che hanno permesso di valutare l'impatto ambientale dell'intero processo sull'ecosistema e le risorse naturali utilizzate. L'elaborato termina con l'analisi dei Costi e dei Benefici della produzione di un kilogrammo di PVC al fine di caratterizzare l'intero processo di sintesi dal punto di vista economico, se competitivo e benefico per la comunità oppure senza vantaggi economici, ambientali e sociali.

APA, Harvard, Vancouver, ISO, and other styles

38

Hunt, Christopher F. "Cost and benefit analysis for the development of a software information system." Master's thesis, This resource online, 1997. http://scholar.lib.vt.edu/theses/available/etd-12162009-020123/.

Full text

APA, Harvard, Vancouver, ISO, and other styles

39

Park, Jaesuk. "Comparative analysis of the VRF system and conventional HVAC systems, focused on life-cycle cost." Thesis, Georgia Institute of Technology, 2013. http://hdl.handle.net/1853/50227.

Full text

Abstract:

As concern for the environment has been dramatically raised over the recent decade, all fields have increased their efforts to reduce impact on environment. The field of construction has responded and started to develop the building performance strategies as well as regulations to reduce the impact on the environment. HVAC systems are obviously one of the key factors of building energy consumption. This study investigates the system performance and economic value of variable refrigerant flow (VRF) systems relative to conventional HVAC systems by comparing life-cycle cost of VRF systems to that of conventional HVAC systems. VRF systems consist mainly of one outdoor unit and several indoor units. The outdoor unit provides all indoor units with cooled or heated refrigerant; with these refrigerants, each indoor unit serves one zone, delivering either heating or cooling. Due to its special configuration, the VRF system can cool some zones and heat other zones simultaneously. This comparative analysis covers six building types—medium office, standalone retail, primary school, hotel, hospital, and apartment—in a eleven climate zones—1A Miami, 2A Houston, 2B Phoenix, 3A Atlanta, 3B Las Vegas, 3C San Francisco, 4A Baltimore, 4B Albuquerque, 4C Seattle, 5A Chicago, and 5B Boulder. Energy simulations conducted by EnergyPlus are done for each building type in each climate zone. Base cases for each simulation are the reference models that U.S. Department of Energy has developed, whereas the alternative case is the same building in the same location with a VRF system. The life-cycle cost analysis provides Net Savings, Savingto- Investment ratio, and payback years. The major findings are that the VRF system has an average of thirty-nine percent HVAC energy consumption savings. As for the results of the life-cycle cost analysis, the average of simple payback period is twelve years.

APA, Harvard, Vancouver, ISO, and other styles

40

Wiles, Stanley W. "Analysis of life cycle cost concepts and their implementation by the Naval Facilities Engineering Command." Thesis, Monterey, California. Naval Postgraduate School, 1997. http://hdl.handle.net/10945/7930.

Full text

Abstract:

CIVINS
The Navy, like many other federal organizations, is being faced with a decreasing budget. One of the Navy's biggest problems is that owning and operating their shore infrastructure is consuming too much of its limited resources. One way to reduce the cost of owning and operating the shore infrastructure is to plan and design facilities with lower life cycle costs i.e. , facilities with components that last longer, cost less to operate, and cost less to maintain. Naval Facilities Engineering Command (NAVFAC), as with all federal agencies, has been directed to perform economic analysis based on Life Cycle Cost (LCC) concepts on all Navy facility projects. However, in a recent study, NAVFAC found that a majority of their facility project areas were not using LCC concepts when conducting economic analysis. This paper will: (1) provide a brief introduction to life cycle cost concepts and economic analysis; (2) introduce NAVFAC and its role in the facility planning process; (3) summarize current federal policies regarding facility planning and LCC concepts; (4) summarize NAVFAC's report concerning the status of LCC in the planning process; (5) analyze and make recommendations to two main issues hindering NAVFAC use of LCC

APA, Harvard, Vancouver, ISO, and other styles

41

Krus, Christopher James. "Analysis of life cycle cost methods for heating, ventilation, and air conditioning systems in hospitals." Thesis, Austin, Texas, University of Texas at Austin, 2004. http://hdl.handle.net/10945/37781.

Full text

Abstract:

CIVINS
The purpose of this research was to evaluate the current body of knowledge relating to life cycle costing of heating, ventilation and air conditioning systems (HVAC) systems in hospitals. Life cycle cost (LCC) is the total cost of procuring, designing, owning, operating, maintaining, and disposing of a building over its useful life (including its fuel and water, energy, labor, and replacement components), determined on the basis of a systematic evaluation and comparison. Both government and private hospitals were studied. Hospitals have several characteristics that made them useful to consider. They are: typically owned by either goverments or large corporations, regulated as a class, not solely driven by profitability or return on investment, financed over the long-term by bonding or taxes, expected to have long service lives, not likely to change building use and functions over time, often procured through processes open to public scrutiny, and operated by decision makers who are not facilities specialists. Evaluation of life cycle costs is important because the true costs of ownership of a facility are much larger than the initial construction cost investment. Initial cost is typically the subject of intense scrutiny during design and planning and HVAC systems represent significant portions of the initial cost of a facility and consequently involve significant design choices and trade-offs.

APA, Harvard, Vancouver, ISO, and other styles

42

Karim, Hawzheen. "Road Design for Future Maintenance : Life-cycle Cost Analyses for Road Barriers." Doctoral thesis, Högskolan Dalarna, Vägteknik, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:du-5474.

Full text

Abstract:

The cost of a road construction over its service life is a function of design, quality of construction as well as maintenance strategies and operations. An optimal life-cycle cost for a road requires evaluations of the above mentioned components. Unfortunately, road designers often neglect a very important aspect, namely, the possibility to perform future maintenance activities. Focus is mainly directed towards other aspects such as investment costs, traffic safety, aesthetic appearance, regional development and environmental effects. This doctoral thesis presents the results of a research project aimed to increase consideration of road maintenance aspects in the planning and design process. The following subgoals were established: Identify the obstacles that prevent adequate consideration of future maintenance during the road planning and design process; and Examine optimisation of life-cycle costs as an approach towards increased efficiency during the road planning and design process. The research project started with a literature review aimed at evaluating the extent to which maintenance aspects are considered during road planning and design as an improvement potential for maintenance efficiency. Efforts made by road authorities to increase efficiency, especially maintenance efficiency, were evaluated. The results indicated that all the evaluated efforts had one thing in common, namely ignorance of the interrelationship between geometrical road design and maintenance as an effective tool to increase maintenance efficiency. Focus has mainly been on improving operating practises and maintenance procedures. This fact might also explain why some efforts to increase maintenance efficiency have been less successful. An investigation was conducted to identify the problems and difficulties, which obstruct due consideration of maintainability during the road planning and design process. A method called “Change Analysis” was used to analyse data collected during interviews with experts in road design and maintenance. The study indicated a complex combination of problems which result in inadequate consideration of maintenance aspects when planning and designing roads. The identified problems were classified into six categories: insufficient consulting, insufficient knowledge, regulations and specifications without consideration of maintenance aspects, insufficient planning and design activities, inadequate organisation and demands from other authorities. Several urgent needs for changes to eliminate these problems were identified. One of the problems identified in the above mentioned study as an obstacle for due consideration of maintenance aspects during road design was the absence of a model for calculating life-cycle costs for roads. Because of this lack of knowledge, the research project focused on implementing a new approach for calculating and analysing life-cycle costs for roads with emphasis on the relationship between road design and road maintainability. Road barriers were chosen as an example. The ambition is to develop this approach to cover other road components at a later stage. A study was conducted to quantify repair rates for barriers and associated repair costs as one of the major maintenance costs for road barriers. A method called “Case Study Research Method” was used to analyse the effect of several factors on barrier repairs costs, such as barrier type, road type, posted speed and seasonal effect. The analyses were based on documented data associated with 1625 repairs conducted in four different geographical regions in Sweden during 2006. A model for calculation of average repair costs per vehicle kilometres was created. Significant differences in the barrier repair costs were found between the studied barrier types. In another study, the injuries associated with road barrier collisions and the corresponding influencing factors were analysed. The analyses in this study were based on documented data from actual barrier collisions between 2005 and 2008 in Sweden. The result was used to calculate the cost for injuries associated with barrier collisions as a part of the socio-economic cost for road barriers. The results showed significant differences in the number of injuries associated with collisions with different barrier types. To calculate and analyse life-cycle costs for road barriers a new approach was developed based on a method called “Activity-based Life-cycle Costing”. By modelling uncertainties, the presented approach gives a possibility to identify and analyse factors crucial for optimising life-cycle costs. The study showed a great potential to increase road maintenance efficiency through road design. It also showed that road components with low investment costs might not be the best choice when including maintenance and socio-economic aspects. The difficulties and problems faced during the collection of data for calculating life-cycle costs for road barriers indicated a great need for improving current data collecting and archiving procedures. The research focused on Swedish road planning and design. However, the conclusions can be applied to other Nordic countries, where weather conditions and road design practices are similar. The general methodological approaches used in this research project may be applied also to other studies.

APA, Harvard, Vancouver, ISO, and other styles

43

Ahn, Yong Han. "The Development of Models to Identify Relationships Between First Costs of Green Building Strategies and Technologies and Life Cycle Costs for Public Green Facilities." Diss., Virginia Tech, 2010. http://hdl.handle.net/10919/26252.

Full text

Abstract:

Public buildings and other public facilities are essential for the functioning and quality of life in modern societies, but they also frequently have a significant negative impact on the natural environment. Public agencies, with their large portfolios of facilities, have faced considerable challenges in recent years in minimizing their negative environmental impacts and energy consumption and coping with shortages of financial capital to invest in new facilities and operate and maintain existing ones, while still meeting their mission goals. These range from the need to provide a quality workplace for their staff to providing a public service and long term benefits to the public. The concept of green building has emerged as a set of objectives and practices designed to reduce negative environment impacts and other challenges while enhancing the functionality of built facilities. However, the prevailing belief related to implementing green building is that incorporating Green Building Strategies and Technologies (GBSTs) increases the initial cost of constructing a facility while potentially reducing its life cycle costs. Thus, this research deals with optimizing the design of individual facilities to balance the initial cost investment for GBSTs versus their potential Life Cycle Cost (LCC) savings without the need to conduct detailed life cycle cost analysis during the early capital planning and budget phases in public sector projects. The purpose of this study is to develop an approach for modeling the general relationship between investments in initial costs versus savings in LCCs involved in implementing green building strategies in public capital projects. To address the research question, this study developed multiple regression models to identify the relationships between GBSTs and their initial cost premiums, operating costs, and LCCs. The multiple regression models include dummy variables because this is a convenient way of applying a single regression equation to represent several nominal variables, which here consist of initial, operating, maintenance, and repair and replacement costs, and ordinal variables, which in this case are the GBST alternatives considered. These new regression models can be used to identify the relationship between GBST alternatives, initial cost premiums, annual operating costs and LCC in the earliest stage of a project, when public agencies are at the capital planning and budgeting stages of facility development, without necessarily needing to know the precise details of design and implementation for a particular building. In addition, this study also proposes and tests a method to generate all the necessary cost data based on building performance models and industry accepted standard cost data. This statistical approach can easily be extended to accommodate additional GBSTs that were not included in this study to identify the relationship between their initial cost premium and their potential LCC saving at the earliest stage of facility development. In addition, this approach will be a useful tool for other institutional facility owners who manage large facility portfolios with significant annual facility investments and over time should help them minimize the environmental impacts caused by their facilities.
Ph. D.

APA, Harvard, Vancouver, ISO, and other styles

44

Kennedy, Christopher J. "A logistic life cycle cost-benefit analysis of power quality management in the avionics repair facility." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1998. http://handle.dtic.mil/100.2/ADA346903.

Full text

Abstract:

Thesis (M.S. in Management) Naval Postgraduate School, June 1998.
Thesis advisor(s): Katsuaki L. Terasawa, Keebom Kang. "June 1998." Includes bibliographical references (p. 75-76). Also available online.

APA, Harvard, Vancouver, ISO, and other styles

45

Hout, Lay. "Decision-Making Model for road planning based on Life Cycle Cost analysis of roads and bridges." Thesis, KTH, Byggvetenskap, 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-271849.

Full text

Abstract:

Infrastructure investment and management often incur high capital cost that dictates the decision making during the planning phase. Future operation and maintenance costs have been considered but in different methods. With the pressure of existing aging infrastructure, the need to cut down maintenance cost has been highlighted. Currently, there is a lack of a standardized framework for decision making. Delay in decision making will lead to construction delay and increase in construction cost. This MSc thesis discusses the various frameworks available and proposes the optimal framework. Life Cycle Cost Analysis (LCCA) provides a methodology to evaluate an object, e.g. a road, through including investment, operation, maintenance, dismantling and landfill or recycling. Higher cost saving will be possible to achieve if LCCA can be applied during the planning phase of the construction. Thus, LCCA is studied and applied on a case study of a section along a 9- km road in south of Sweden. By considering the specific site conditions such as soil profile and road alignment, this thesis evaluates its effect on LCCA. Sensitivity analysis is carried out on the cost output due to uncertainty variable input of the data. The aim of this thesis is to formulate a generic model/tool for decision making based on LCCA methodology on the project level. The rules and regulations provided by Trafikverket (Swedish Transport Administration) and ISO standard for life cycle costing are used as parameters during the analysis. The model described above can be used in different countries if these parameters are redefined by adapting local standards and conditions. This thesis demonstrates the application of the model with a case study to discuss the difference between two different alternatives. The case study compares two alternatives for the same stretch of the road. The first alternative proposes a longer bridge while the second alternative provides a shorter bridge. The result shows that the first alternative has slightly lower LCC compared to the second alternative. Through understanding all the costs connected to the project, cost calculation has been adjusted to ensure accuracy of the data input. Finally, the result from the cost comparison is tested with Monte Carlo Simulation to manage uncertainty risks.

APA, Harvard, Vancouver, ISO, and other styles

46

Seat, Conor Judd. "Crash Severity Distributions for Life-Cycle Benefit-Cost Analysis of Safety-Related Improvements on Utah Roadways." BYU ScholarsArchive, 2018. https://scholarsarchive.byu.edu/etd/6875.

Full text

Abstract:

The Utah Department of Transportation developed life-cycle benefit-cost analysis spreadsheets that allow engineers and analysts to evaluate multiple safety countermeasures. The spreadsheets have included the functionality to evaluate a roadway based on the 11 facility types from the Highway Safety Manual (HSM) with the use of crash severity distributions. The HSM suggests that local agencies develop crash severity distributions based on their local crash data. The Department of Civil and Environmental Engineering at Brigham Young University worked with the Statistics Department to develop crash severity distributions for the facility types from the HSM.The primary objective of this research was to utilize available roadway characteristic and crash data to develop crash severity distributions for the 11 facility types in the HSM. These objectives were accomplished by segmenting the roadway data based on homogeneity and developing statistical models to determine the distributions. Due to insufficient data, the facility types of freeway speed change lanes and freeway ramps were excluded from the scope of this research. In order to accommodate more roadways within the research, the facility type definitions were expanded to include more through lanes.The statistical models that were developed for this research include multivariate regression, frequentist binomial regression, frequentist multinomial, and Bayesian multinomial regression models. A cross-validation study was conducted to determine the models that best described the data. Bayesian Information Criterion, Deviance Information Criterion, and Root-Mean-Square Error values were compared to conduct the comparison. Based on the cross-validation study, it was determined that the Bayesian multinomial regression model is the most effective model to describe the crash severity distributions for the nine facility types evaluated.

APA, Harvard, Vancouver, ISO, and other styles

47

Whatley, Melvin B. "Life-cycle cost-benefit analysis of green roofing systems: the economic and environmental impact of installing green roofs on all atlanta public schools." Thesis, Georgia Institute of Technology, 2011. http://hdl.handle.net/1853/39623.

Full text

Abstract:

This study examines the relationship between environmental sustainability and green schools, seeking to highlight the benefits and determine the Net Present Value (NPV) installing vegetative roofs on all schools in the Atlanta Public Schools District. This study quantifies the costs and benefits of thin-layer, or extensive, green roof systems as they compare to typical flat roofs on Atlanta Public Schools. Quantifiable benefits are detailed and suggestions are made to create the means by which other social benefits may be quantified. The purpose of this thesis is to establish proof to the Atlanta Public Schools District that over a 40 year period there are more benefits associated with installing vegetative roofs on all of their flat roofs than there are costs. While some may argue that greens roof are more costly than traditional roof systems, this study provides evidence that the cumulative benefits over a 40 year life cycle associated with large scale green roof installations, such as on all Atlanta Public Schools, are greater than the initial costs incurred. Factors included in the analysis of benefits were reductions to energy/utility costs, reduced emissions, and avoided best management practices (BMPs). Other considerations include social benefits resulting from the mitigation of storm water runoff, reductions to the urban heat island, productivity level increases (students and teachers), and avoided regulatory fees.

APA, Harvard, Vancouver, ISO, and other styles

48

Ludvigsson, Rebecka. "Life Cycle Costing in the evaluation process of new production lines." Thesis, Linnaeus University, School of Engineering, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:lnu:diva-101.

Full text

Abstract:

The purpose of this thesis is to develop a Life Cycle Cost model that could be used for investment, budgeting and comparing alternatives. An evaluation of existing models concluded that there was a need for a model that was easy to use and understand but in the same way economical and technical complex. Theoretical and empirical information was gathered in accordance with the purpose and made a base of the model. The model highlights operative, energy and maintenance costs. A case study to test the model has been carried out and selected company for this has been Swedwood International AB which is a part of IKEA. Swedwood currently works with pay back calculations which could lead to wrong decisions during the life length of the investment. The developed LCC model was tested on different techniques for applying an edge on a substrate. The result of the report is that the user will have a clear and structured overview of an investment during its economical life length. A final investment decision demands further tests and evaluations, for example technical test and MCDM. Further researches for the LCC model could be to investigate if the model lacks any critical aspects that should be included. A recommendation for Swedwood is to follow up the developed standards for collecting data at the factories in order to facilitate when investigating for new techniques and comparing between investment options.

Syftet med examensarbetet är att utveckla en livscykelkostnadsmodell som kan användas vid investeringar, budgeteringar och jämförelser. Efter en utvärdering av tillgängliga modeller konstaterades det att behov fanns för en modell som var ekonomisk och teknisk avancerad men ändå användarvänlig. Teori och empiri insamlades i enlighet med syftet och bildade en grund för modellen. Modellen belyser speciellt kostnadsaktiviteter så som operativa, energi och underhållskostnader. En fallstudie för att testa modellen har genomförts och fallföretaget var Swedwood International AB som är en del av IKEA. Swedwood arbetar nu med payback kalkyler vilket kan leda till fel beslut sett till hela investeringens livslängd. Den framtagna LCC modellen testades på olika tekniker för att applicera en kant på ett arbetstycke. Resultatet av rapporten är genom att använda modellen får man en klar och tydlig översikt av alla kostnader under en investerings ekonomiska livslängd. Ett investeringsbeslut kräver ytterligare tester och utvärderingar så som tekniska tester och MCDM. En fortsatt utveckling av modellen kan vara att undersöka om den saknar någon kritisk del som ska var inkluderad. En rekommendation till Swedwood är att följa upp de centralt utvecklade standarder på fabrikerna så att alla samlar in data på samma sätt, vilket skulle underlätta vid implementering av nya tekniker och vid jämförelser av investeringar.

APA, Harvard, Vancouver, ISO, and other styles

49

Nosrati, Kamyar. "Substation Reliability Analysis Using PSS/E." Thesis, KTH, Electromagnetic Engineering, 2011. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-48118.

Full text

Abstract:

This report documents an MSc Thesis work of sub-transmission reliability study using PSS/Eperformed at Vattenfall. The network that is examined in this thesis is a sub-transmission network.Vattenfall Distribution Sweden is going to invest and rebuild the network in their 70 and 130 kVmeshed sub transmission network. To invest and rebuild in a network is very expensive. The gridowners want a reliable system that has a high reliability at a low cost.The main focus in this thesis is to examine different substation layouts. Calculating the failureintensities and unavailability for the different substation layouts gives the opportunity to do a life cyclecosts (LCC) on the different substations. With help of LCC calculations it is possible to find thesubstation that gives the lowest cost during a life time. Choosing right equipment in the grid will helpthe Vattenfall network company lower their equipment costs.The thesis work consists of mainly three parts as follows. Network modeling in PSS/EA subset of the existing sub transmission network was used in the project. This subset was taken outfrom the complete network model and modeled in PSS/E. Validation of PSS/E reliability modulesPSS/E reliability modules were new and have not been used earlier by the Vattenfall networkcompany. To be sure that the program calculates correctly a validation was performed. The main focusof the validation has been in looking if the program calculates the interrupted power correctly. Reliability analysis of different substation layoutsFor each of the substation layout the reliability was calculated. On component level (e.g. breaker,disconnector) different types of configuration were studied. To find out the best layout from aneconomical point of view a LCC calculation was also performed.The LCC calculation on the different substation layouts showed that the investment costs affect theresult very much. When the active power through the substation is low it is preferred to use asubstation that has low investment costs. At active power that is 30 MW or higher it is preferred to usethe substation with higher reliability (having higher investment cost). The result shows that using acombined breaker and disconnector instead of circuit breaker could lower the failure intensity andunavailability of substations.

APA, Harvard, Vancouver, ISO, and other styles

50

Williamson, Gregory Scott. "Service Life Modeling of Virginia Bridge Decks." Diss., Virginia Tech, 2007. http://hdl.handle.net/10919/26594.

Full text

Abstract:

A model to determine the time to the End of Functional Service Life (EFSL) for concrete bridge decks in Virginia was developed. The service life of Virginia bridge decks is controlled by chloride-induced corrosion of the reinforcing steel. Monte Carlo resampling techniques were used to integrate the statistical nature of the input variables into the model. This is an improvement on previous deterministic models in that the effect of highly variable input parameters is reflected in the service life estimations. The model predicts the time required for corrosion to initiate on 2% of the reinforcing steel in a bridge deck and then a corrosion propagation time period, determined from empirical data, is added to estimate the EFSL for a given bridge deck or set of bridge decks. Data from 36 Virginia bridge decks was collected in order to validate the service life model as well as to investigate the effect of bridge deck construction specification changes. The bridge decks were separated into three distinct groups: 10 bare steel reinforcement decks â 0.47 water/cement (w/c), 16 Epoxy-Coated Reinforcement (ECR) decks â 0.45 w/c, and 10 ECR decks â 0.45 w/(c+pozzolan). Using chloride titration data and cover depth measurements from the sampled bridge decks and chloride corrosion initiation values determined from the literature for bare steel, service life estimates were made for the three sets of bridge decks. The influence of the epoxy coating on corrosion initiation was disregarded in order to allow direct comparisons between the three sets as well as to provide conservative service life estimates. The model was validated by comparing measured deterioration values for the bare steel decks to the estimated values from the model. A comparison was then made between the three bridge deck sets and it was determined that bridge decks constructed with a 0.45 w/(c+p) will provide the longest service life followed by the 0.47 w/c decks and the 0.45 w/c decks, respectively. From this it can be inferred that the addition of pozzolan to the concrete mix will improve the long-term durability of a bridge deck while a reduction in w/c appears to be of no benefit.
Ph. D.

APA, Harvard, Vancouver, ISO, and other styles

Dissertations / Theses on the topic 'Life cycle cost analysis'

Create a spot-on reference in APA, MLA, Chicago, Harvard, and other styles