Academic literature on the topic 'Total Lifecycle Approach'
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Journal articles on the topic "Total Lifecycle Approach"
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Al-Khomairi, Abdulrahman, BongSeog Jung, and Ibrahim Elsebaie. "Lifecycle cost optimization of pipeline projects." Journal of Water Supply: Research and Technology-Aqua 69, no. 7 (October 5, 2020): 656–67. http://dx.doi.org/10.2166/aqua.2020.147.
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Abstract Lifecycle cost optimization for a pipeline network with medium-sized pipes is performed considering steady and unsteady flow conditions. Genetic algorithms are used to generate a wide range of hydraulically acceptable solutions and search for the most economical solutions. The impact of each cost component on the total cost is determined in this study. The decision variables include the pipe diameter, pipe material, pipe pressure rating, surge tank size and operational and maintenance costs over the project service life. A real-case project is presented to crosscheck the suggested procedure. Significant cost variations are observed, even between equally acceptable designs. Furthermore, the operational cost has a deterministic effect on the parameters of the optimum solution. Compared to conventional design wisdom that focuses on reducing the pipe diameter as much as possible to reduce the project cost, this approach demonstrates that significant savings in pipeline project costs can be achieved by carefully investigating all possible design alternatives under steady and unsteady flow conditions.
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Ajayi, Saheed O., Lukumon O. Oyedele, and Jamiu A. Dauda. "Dynamic relationship between embodied and operational impacts of buildings." World Journal of Science, Technology and Sustainable Development 16, no. 2 (April 1, 2019): 70–81. http://dx.doi.org/10.1108/wjstsd-05-2018-0048.
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Purpose Buildings and their construction activities consume a significant proportion of mineral resources excavated from nature and contribute a large percentage of CO2 in the atmosphere. As a way of improving the sustainability of building construction and operation, various sustainable design appraisal standards have been developed across nations. Albeit criticism of the appraisal standards, evidence shows that increasing sustainability of the built environment has been engendered by such appraisal tools as Building Research Establishment Environmental Assessment Method (BREEAM), Code for Sustainable Homes (CfSH), Leadership in Energy and Environmental Design and Comprehensive Assessment System for Built Environment Efficacy, among others. The purpose of this paper is to evaluate the effectiveness of the appraisal standards in engendering whole lifecycle environmental sustainability of the built environment. Design/methodology/approach In order to evaluate the adequacy of sustainability scores assigned to various lifecycle stages of buildings in the appraisal standards, four case studies of a block of classroom were modelled. Using Revit as a modelling platform, stage by stage lifecycle environmental impacts of the building were simulated through Green Building Studio and ATHENA Impact estimator. The resulting environmental impacts were then compared against the assessment score associated with each stage of building lifecycle in BREAAM and CfSH. Findings Results show that albeit the consensus that the appraisal standards engender sustainability practices in the AEC industry, total scores assigned to impacts at each stage of building lifecycle is disproportionate to the simulated whole-life environmental impacts associated with the stages in some instances. Originality/value As the study reveals both strengths and weaknesses in the existing sustainability appraisal standards, measures through which they can be tailored to resource efficiency and lifecycle environmental sustainability of the built environment are suggested.
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Vuorinen, Lauri, and Miia Maarit Martinsuo. "Lifecycle view of managing different changes in projects." International Journal of Managing Projects in Business 12, no. 1 (March 4, 2019): 120–43. http://dx.doi.org/10.1108/ijmpb-11-2017-0135.
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Purpose A project contractor can promote the success of a delivery project by planning the project well and following a project management methodology (PMM). However, various changes typically take place, requiring changes to the project plan and actions that deviate from the firm’s established PMM. The purpose of this paper is to explore different types of changes and change management activities over the lifecycle of delivery projects. Design/methodology/approach A qualitative single case study design was used. In total, 17 semi-structured interviews were carried out during a delivery project in a medium-sized engineering company that delivers complex systems to industrial customers. Findings Both plan-related changes and deviations from the PMM were mapped throughout the project lifecycle. Various internal and external sources of change were identified. An illustrative example of the interconnectedness of the changes reveals the potential escalation of changes over the project lifecycle. Managers and project personnel engage in different change management activities and improvisation to create alternative paths, re-plan, catch up, and optimize project performance after changes. Research limitations/implications The empirical study is limited to a single case study setting and a single industry. The findings draw attention to the interconnectedness and potential escalation effect of changes over the lifecycle of the project, and the need for integrated change management and improvisation actions. Practical implications Efficient change management and improvisation at the early phase of a delivery project can potentially mitigate negative change incidents in later project phases. Changes are not only the project manager’s concern; project personnel’s skilled change responses are also helpful. The findings emphasize the importance of the project customer as a source of changes in delivery projects, meaning that customer relationship management throughout the project lifecycle is needed for successful change management. Originality/value The study offers increased understanding of changes and change management throughout the project lifecycle. The results show evidence of plan-related and methodology-related changes and their interconnections, thereby proposing a lifecycle view of integrated change management and improvisation in projects.
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Smyth, Hedley, Aaron M. Anvuur, and Illona Kusuma. "Integrated solutions for total asset management through “RIVANS”." Built Environment Project and Asset Management 7, no. 1 (February 6, 2017): 5–18. http://dx.doi.org/10.1108/bepam-07-2015-0034.
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Purpose Examine the extent of integration in delivering value from design and construction (DC) activities for total asset management (TAM) and operations post-completion. DC and operations and management (OM) are both addressed. The problem owners are those in roles and organisations responsible for integrating DC with OM. The purpose of this paper is to show the extent of integration between actors along the project lifecycle. Relationally integrated value networks (RIVANS) provide the conceptual lens for the analysis. Design/methodology/approach A mixed method approach was used. A questionnaire survey and semi-structured interviews were employed. Findings There is a lack of engagement between DC and OM. The trend is moving counter to integration. BIM is not found to be a technical solution. Research limitations/implications The mixed method helps extend the RIVANS perspective. Further research to understand and support integration is needed, especially qualitative research to provide greater granular understanding. Practical implications The identified trend away from integration poses management challenges in delivery and for sustainability in use. Supply chains engage specialists, yet internal and inter-organisational collaboration require management attention to value creation. This includes the DC-OM interface. Both sides can benefit from increased engagement. Social implications Infrastructure and property provision will continue to fall short of user and environmental functionality without improved integration. Originality/value A contribution to the project and asset management interface is made, showing low integration, disengaged asset management. BIM is unable to plug the gaps. The RIVANS analytical lens provides a perspective for improvement.
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Rezgui, Yacine, Thomas Beach, and Omer Rana. "A GOVERNANCE APPROACH FOR BIM MANAGEMENT ACROSS LIFECYCLE AND SUPPLY CHAINS USING MIXED-MODES OF INFORMATION DELIVERY." Journal of Civil Engineering and Management 19, no. 2 (April 18, 2013): 239–58. http://dx.doi.org/10.3846/13923730.2012.760480.
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Built environment data is of varying nature embedding various forms of sensitivities with potential legal, contractual, intellectual property, and security implications. The paper presents a governance approach for managing multi-actor, multi-discipline, and total lifecycle data, informed by a wide industry consultation conducted in the UK between March and September 2011. The study identifies a number of barriers in engaging with Building Information Modelling (BIM) efforts with a view of facilitating collaboration around a common and integrated project specification. A governance model is proposed that addresses the identified adoption blockers underpinned by a “mixed approach”, that factors in various modes of information delivery, ranging from paper-based documents to object-based information conveyed by IFC (Industry Foundation Classes). A demonstrator system is developed and used to validate our BIM governance concepts. Our governance model is discussed in the context of the recent UK government BIM industry consultation document supported by a research and development (R&D) roadmap taking into account current industry structure and its various levels of stakeholders’ maturity, capability and readiness.
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Egilmez, M. Mert, Jong Min Park, Alparslan Emrah Bayrak, Bogdan I. Epureanu, and Panos Y. Papalambros. "Adaptability of modular vehicle fleets to changing supply route characteristics." Journal of Defense Modeling and Simulation: Applications, Methodology, Technology 17, no. 4 (September 10, 2019): 327–38. http://dx.doi.org/10.1177/1548512919874127.
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Modularity in vehicle systems can reduce total lifecycle cost and improve adaptability for ground military fleets. This paper quantifies the adaptability of vehicle fleets to changes in supply route characteristics defined by route distance, threat level, and damage probability. Each characteristic is discretized into three levels, and the adaptability analysis is performed over 27 scenarios with significantly different characteristics. Fleet adaptability is measured in terms of two fleet-level metrics, namely the total fleet mass (which is correlated to the total cost) and the personnel requirements. Results show that modularity improves adaptability in terms of total fleet mass compared with a conventional approach, while providing a comparable adaptability in terms of personnel requirements. A sensitivity analysis is also performed on module characteristics of the modular fleet. This analysis shows that changes in relatively small parts of the system can change the values of performance metrics substantially.
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Rohman, Mohammad Arif, Hemanta Doloi, and Christopher Andrew Heywood. "Success criteria of toll road projects from a community societal perspective." Built Environment Project and Asset Management 7, no. 1 (February 6, 2017): 32–44. http://dx.doi.org/10.1108/bepam-12-2015-0073.
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Purpose While the success of the toll road projects procured through public private partnerships (PPPs) routes are widely confined to the cost, time and quality performance in the delivery context, considerable evidence suggests that such success criteria are not sufficient when the toll road projects are assessed in relation to meeting the long-run community expectations. The purpose of this paper is to examine the key factors associated with the success of the toll road projects from a societal perspective in Indonesia. Design/methodology/approach Based on the input from 12 experts and a rigorous literature review, a questionnaire survey was designed and a total of 206 respondents from three broad stakeholders’ groups, namely, government, private and end-users’ communities were surveyed to measure the performance of eight toll road projects. The data were primarily analyzed using exploratory factor analysis and reliability test using SPSS Software. Findings Four significant factors associated with the project social benefit were established as a measure of the overall success criteria in toll road projects. It is expected these can be used as guidance to deliver project social benefit to the community in the overall project lifecycle. Research limitations/implications This research contributes to the incorporation of social project benefit attributes to the the toll road projects’ success criteria in overall project lifecycle. Practical implications This study can be used as guidance for the overall stakeholders, such as the government and the project manager to address the current social problems and better navigate the project direction in order to achieve the overall toll road project success in the overall project lifecycles. Social implications The research highlights how the Indonesian government’s program of developing toll road projects using the PPP procurement routes can be supported for complete social inclusivity by considering the social dimension to achieve long-term success. Originality/value Identification of the key project social factors based on the data set with a wide representation of the stakeholders has made the research original and unique.
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Gangurde, Sanjaykumar R., and Milind M. Akarte. "Segmentation based product design using preferred features." Benchmarking: An International Journal 22, no. 6 (August 3, 2015): 1096–114. http://dx.doi.org/10.1108/bij-11-2014-0104.
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Purpose – The purpose of this paper is to present a systematic methodology for segmenting customers based on the preferred product features, its cost and worth, so as to facilitate the designer to develop a product that will simultaneously minimize product cost and maximize customer satisfaction. Design/methodology/approach – Post hoc – non-overlapping – non-hierarchical approach has been used for segmentation based on preferred product features by the customers. Allocation of product features to a particular segment is carried out by considering feature cost and customer worth for that feature. Automobile car has been selected as an example to demonstrate the methodology, where features data were collected from dealers and customer worth data were obtained by random generation method. Findings – Methodology facilitates creation of n number of homogeneous segments from a heterogeneous customer group based on the cost and worth of product features. Total product cost decreases though product variety increased due to segmentation. Originality/value – The proposed approach will help designers in segmenting (grouping) heterogeneous customers based on the preferred product features so that a most compatible (matching) product configuration for each segment, especially during product consolidation stage (beginning of the maturity phase of product lifecycle) can be developed to achieve maximum customer satisfaction.
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KUMAR, VIJAY, SUNIL KUMAR KHATRI, HITESH DUA, MANISHA SHARMA, and PARIDHI MATHUR. "AN ASSESSMENT OF TESTING COST WITH EFFORT-DEPENDENT FDP AND FCP UNDER LEARNING EFFECT: A GENETIC ALGORITHM APPROACH." International Journal of Reliability, Quality and Safety Engineering 21, no. 06 (December 2014): 1450027. http://dx.doi.org/10.1142/s0218539314500272.
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Software testing involves verification and validation of the software to meet the requirements elucidated by customers in the earlier phases and to subsequently increase software reliability. Around half of the resources, such as manpower and CPU time are consumed and a major portion of the total cost of developing the software is incurred in testing phase, making it the most crucial and time-consuming phase of a software development lifecycle (SDLC). Also the fault detection process (FDP) and fault correction process (FCP) are the important processes in SDLC. A number of software reliability growth models (SRGM) have been proposed in the last four decades to capture the time lag between detected and corrected faults. But most of the models are discussed under static environment. The purpose of this paper is to allocate the resources in an optimal manner to minimize the cost during testing phase using FDP and FCP under dynamic environment. An elaborate optimization policy based on optimal control theory for resource allocation with the objective to minimize the cost is proposed. Further, genetic algorithm is applied to obtain the optimum value of detection and correction efforts which minimizes the cost. Numerical example is given in support of the above theoretical result. The experimental results help the project manager to identify the contribution of model parameters and their weight.
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Egilmez, Gokhan, N. Muhammad Aslaam Mohamed Abdul Ghani, and Ridvan Gedik. "Layer analysis of CO2 sources in the US economic supply chains: an input output LCA study." Industrial Management & Data Systems 117, no. 10 (December 4, 2017): 2171–93. http://dx.doi.org/10.1108/imds-11-2016-0473.
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Purpose Carbon footprint assessment requires a holistic approach, where all possible lifecycle stages of products from raw material extraction to the end of life are considered. The purpose of this paper is to develop an analytical sustainability assessment framework to assess the carbon footprint of US economic supply chains from two perspectives: supply chain layers (tiers) and carbon footprint sources. Design/methodology/approach The methodology consists of two phases. In the first phase, the data were collected from EORA input output and environmental impact assessment database. In the second phase, 48 input-output-based lifecycle assessment models were developed (seven CO2 sources and total CO2 impact, and six supply chain tiers). In the third phase, the results are analyzed by using data visualization, data analytics, and statistical approaches in order to identify the heavy carbon emitter industries and their percentage shares in the supply chains by each layer and the CO2 source. Findings Vast majority of carbon footprint was found to be attributed to the power generation, petroleum refineries, used and secondhand goods, natural gas distribution, scrap, and truck transportation. These industries dominated the entire supply chain structure and found to be the top drivers in all six layers. Practical implications This study decomposes the sources of the total carbon footprint of US economic supply chains into six layers and assesses the percentage contribution of each sector in each layer. Thus, it paves the way for quantifying the carbon footprint of each layer in today’s complex supply chain structure and highlights the importance of handling CO2 source in each layer separately while maintaining a holistic focus on the overall carbon footprint impacts in the big picture. In practice, one size fits all type of policy making may not be as effective as it could be expected. Originality/value This paper provides a two-dimensional viewpoint for tracing/analyzing carbon footprint across a national economy. In the first dimension, the national economic system is divided into six layers. In the second dimension, carbon footprint analysis is performed considering specific CO2 sources, including energy production, solvent, cement and minerals, agricultural burning, natural decay, and waste. Thus, this paper contributes to the state-of-art sustainability assessment by providing a comprehensive overview of CO2 sources in the US economic supply chains.
Dissertations / Theses on the topic "Total Lifecycle Approach"
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Dunlap, Gary H. "Applied Information Technology (IT) for ship design, production and lifecycle support : a total systems approach." Thesis, Monterey, California. Naval Postgraduate School, 1999. http://hdl.handle.net/10945/7977.
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CIVINSThis thesis analyzes the material flows, manpower usage, administrative requirements and procedures, and technical interface needs employed in the logistics systems onboard aircraft carriers and submarines to determine where Information Technology (IT) could be applied to reduce life cycle costs and manning demands. The concepts and recommendations derived from this study support the Focused Logistics pillar of Joint Vision 2010 (JV 2010), and guidance of the Federal Acquisition Streamlining Act (FASA), the Federal Acquisition Reform Act (FARA), and DoD Directive 5000.1 (March 15, 1996) to incorporate proven commercial business practices into DoD processes. The first step was to baseline the existing logistics infrastructure for two platforms, namely the aircraft carrier and the submarine, to identify what could be done with IT to make the process more effective. In addition, a broad area search of Navy wide logistics IT insertion initiatives, and numerous discussions with logistics experts across the Navy and their supporting contractor base were made to ensure that recommendations would be pertinent to current issues. Once the data was all compiled, it was analyzed to identify any gaps which could be potentially solved through the insertion of IT. This analysis indicated that the computer migration plan under the Naval Tactical Command Support Systems (NTCSS) application programs was progressing smoothly, and that the communication connectivity issues associated with exchanging real time data were also well underway through the Information Technology 21st Century (IT-21) initiatives. The one glaring area which was demanding a great deal of time for shipboard supply personnel, and was not getting much attention by the Navy logistics leadership, was in the data acquisition point in the system. Thus, for logistics, material tagging technology in support of more efficient receipt and inventory actions needed to be investigated
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Dunlap, Gary H. (Gary Holt) 1961. "Applied information technology (IT) for ship design, production and lifecycle support : a total systems approach." Thesis, Massachusetts Institute of Technology, 1999. http://hdl.handle.net/1721.1/80194.
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Thesis (S.M. in Naval Construction and Engineering)--Massachusetts Institute of Technology, Dept. of Ocean Engineering; and (S.M. in Ocean Systems Management)--Massachusetts Institute of Technology, Dept. of Ocean Engineering, 1999.Includes bibliographical references (leaves 108-110).
by Gary H. Dunlap.
S.M.in Ocean Systems Management
S.M.in Naval Construction and Engineering
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Ali, Ammar. "PRODUCT DISASSEMBLABILITY AND REMANUFACTURABILITY ASSESSMENT: A QUANTITATIVE APPROACH." UKnowledge, 2017. https://uknowledge.uky.edu/me_etds/109.
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Majority of the products get discarded at end-of-life (EoL), causing environmental pollution, and resulting in a complete loss of all materials and embodied energy. Adopting a closed-loop material flow approach can aid preventing such losses and enable EoL value recovery from these products. Design and engineering decisions made and how products are used impact the capability to implement EOL strategies such as disassembly and remanufacturing. Some underlying factors affecting the capability to implement these EOL strategies have been discussed in previous studies. However, relevant metrics and attributes are not well defined and comprehensive methods to quantitatively evaluate them are lacking. This study will first identify key lifecycle oriented metrics affecting disassemblability and remanufacturability. Then a methodology is proposed for the quantitative evaluation of these strategies considering the quality of returns, product-design characteristics and process technology requirements. Finally, an industrial case-study is presented to demonstrate the application of the proposed method.
Books on the topic "Total Lifecycle Approach"
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Dunlap, Gary H. Applied Information Technology (IT) for ship design, production and lifecycle support: A total systems approach. Springfield, Va: Available from National Technical Information Service, 1999.
Find full textConference papers on the topic "Total Lifecycle Approach"
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Long, Daniel, and Scott Ferguson. "An Excess Based Approach to Change Propagation." In ASME 2019 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2019. http://dx.doi.org/10.1115/detc2019-98404.
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Abstract This research demonstrates how the Decision Based Design (DBD) approach can be used for determining a system’s lifecycle value when including excess. Prior research has shown that excess (the degree to which a component or attribute is sized beyond the minimum required to support the initially fielded system) can reduce the cost of changing a system. Theoretically, excess inhibits change propagation within a system and could be strategically added to increase the value of that system. Including excess, however, also adds cost and potentially impacts system performance. Prior research has not quantitatively linked excess as a means of limiting change propagation to system lifecycle value. This work advances the existing literature by considering how excess is imbedded in a system and what impact excess has on the system’s total value. After being introduced, the method is demonstrated on a desktop computer example. Results from the study are used to show how decisions about power supply capacity can be optimized by incorporating excess to achieve flexibility.
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Wardhani, Rivai, Chao Liu, Khamdi Mubarok, and Xun Xu. "An Approach to Complete Product Definition Using STEP in Cloud Manufacturing." In ASME 2018 13th International Manufacturing Science and Engineering Conference. American Society of Mechanical Engineers, 2018. http://dx.doi.org/10.1115/msec2018-6613.
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The advancement of various product development technologies is contributing to a total integrated manufacturing process. And model-based design (MBD) is a key enabler for such a total integration. The current MBD approach still does not support retaining of information needed at different stages of a product lifecycle. Collaboration among different Computer Aided Design (CAD) systems still becomes an issue due to the different proprietary data format. This research provides a consolidated approach to complete product definition based on STEP AP242 neutral data format using general notes data structure. To validate and demonstrate the solution, the approach is instantiated in P21 design file and implemented in cloud manufacturing as a case study.
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Mandolini, Marco, Claudio Favi, Federico Campi, and Michele Germani. "A Decision-Making Approach for Procuring Custom-Made Machineries and Components." In ASME 2020 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2020. http://dx.doi.org/10.1115/detc2020-22292.
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Abstract The paper wants to improve the procurement processes for custom-made machineries and components. Indeed, the current methods and software platforms adopted by industries for purchasing machineries do not consider value generated through the entire lifecycle. Furthermore, the purchasing process of custom-made components from external suppliers is often and still characterized by several negotiation activities. This paper wants to improve this context by proposing two approaches to fostering the procurement processes. The first objective is to define an approach for standardizing the method for configuring machineries to be supplied from suppliers and to establish an approach for estimating their costs. The most important benefits of such an approach consist of (i) machinery selection based on the Total Value of Ownership (TVO), and (ii) optimized suppliers’ selection by strengthening relationships between customers and suppliers. The second objective is to define a method and a software platform for managing the procurement phase of custom-made components. The most important benefits of this approach consist of (i) the standardization of procurement policies for custom and standard components, and (ii) the faster budgeting process. Future work consists of defining a reference model for gathering primary data required for TVO computation and defining standard agreements between suppliers and customers.
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Zeng, Sai, Jose´ Gomes, Man-Mohan Singh, Laurent Balmelli, and Ioana M. Boier-Martin. "A Model-Driven Development Approach to Integrating Requirements, Design and Simulations in the Early Stages of Product Development." In ASME 2007 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. ASMEDC, 2007. http://dx.doi.org/10.1115/detc2007-34208.
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Decisions made in the early stages of the product development lifecycle have significant impact on the downstream activities. However, existing tools supporting decision-making and product verification at these stages are very limited. One of the obvious reasons is the lack of a common understanding between the system-level design activity and the design activities within the various participating engineering disciplines. In this paper, we propose a collaboration solution which we have developed and commercialized based on the model-driven development platform that allows numerous engineers from heterogeneous engineering disciplines to collaborate on the development of a complex system, such as an automobile. It helps engineers apprehend the system holistically and collectively thus make better architectural decisions. More specifically, this solution connects discipline-specific designs and simulations with the system-level requirements that trigger them in order to facilitate the integration of development efforts and to enable system-level evaluation of the design concepts early in the product development processes. Our approach provides an effective way to trace and analyze the impact of requirements and design changes, facilitates reuse of simulation artifacts for the optimization of future product designs, and supports decision-making activities at the system level. We illustrate our approach in the context of a automotive use case involving mechanical, requirement and safety engineers respectively using their own authoring environments but collectively in synch on the total system thanks to an SOA (Service-Oriented Architecture) based integration between their authoring environments.
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Pintzos, George, Markos Matsas, Christos Triantafyllou, Nikolaos Papakostas, and George Chryssolouris. "An Integrated Approach to the Planning of Manual Assembly Lines." In ASME 2015 International Mechanical Engineering Congress and Exposition. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/imece2015-52962.
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Manual assembly planning methodologies have been in the center of industrial and academic research for many decades, since the manual assembly costs may often account for even half of the total manufacturing expenses. The existing and emerging manufacturing trends, such as mass customization and personalization, require fast responses when it comes to the conception and realization of the relevant manufacturing systems. Even though, work methodologies, such as concurrent engineering, have been proposed and applied, gaps still exist among product development, configuration and manufacturing. The Current Product Lifecycle (PLM) systems focus on the coordination of activities among engineers of different disciplines. However, they are unable to provide actual decision support functionality to decision makers. Moreover, solutions for the different phases of assembly planning have been proposed, without nevertheless taking into account the holistic nature of assembly planning that spans the different engineering phases. The study presented in this paper is based on a methodology that integrates three distinct steps, regarding assembly planning; the generation of assembly related information, from the Computer Aided Design (CAD) files of an assembly, the calculation of the relevant process times from functions, generated through empirical measurements and the assembly line balancing of a line, based on the information gathered. The innovative aspect of this approach relies on the advancement of the relevant technologies as well as on their integration into a common working practice. The methodology enables the estimation of production related values in the later phases of product design or in the early phases of manufacturing planning. The generation of assembly precedence diagrams is made in an automatic way through the extraction of information on collision detection and the parts’ relations. This application is developed in the form of an add-on to a commercial CAD software suite. It utilizes features that are available in a wide range of such systems. The second step relies on the identification of specific features of parts, such as dimensions and mass. This information is then used as input in the functions already proposed in the academic literature for the estimation of the relevant process times for each part. Finally, the assembly line balancing is performed through the generation of the precedence diagram and the estimated process times, via a web-based service, which makes use of advanced optimization techniques. In order for this methodology to be evaluated, a case study is presented by using the CAD file of an automotive sub-assembly. The case study demonstrates each step separately, beginning with the generation of the precedence diagram down to the balancing of the assembly line.
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Krebs, Alastair E. "Pipeline Maintenance Management: A Crucial Tool to Improve Safety and Efficiency." In 2002 4th International Pipeline Conference. ASMEDC, 2002. http://dx.doi.org/10.1115/ipc2002-27344.
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For any pipeline company to be successful and be seen as a respected global citizen, the impact of its operation on health, safety and the environment must be minimal and its productivity must be optimized at the lowest possible costs. In order to accomplish this an integrated maintenance management process must align to the business needs without impact on safety and the environment. This process must create an environment where by maintenance events are measured to determine their impact on the safety, environmental, and business goals. As a result the maintenance strategy is adapted to maximize the safety, environmental and business performance. An integrated maintenance management process will enhance the revenue earning capability of the business and not be a burden on it. To make the difference, a step change in thinking is required. For example: • Reducing maintenance activity whilst improving performance. • Establishing a benchmark performance model for the pipeline asset. • Maintenance must be seen as a dynamic process continually striving to improve performance. • Maintenance as a tool to identify and reduce health, safety, environmental and business risks to a level as low as reasonably practicable (ALARP). • Maintenance as a contributing factor to an increase in revenue earning capability through an increase in efficiency, as opposed to maintenance seen purely as a cost burden. • Maintenance management as a structured tool to reduce inventory and lifecycle costs, instead of subjective judgement. • Maintenance management as a tool to capture and protect corporate maintenance and operational knowledge, versus the costly process of reinventing the wheel over and over again by repetitive unwanted events. This way of thinking requires vision and commitment of the upper (corporate) management level as the maintenance and operational departments can never reach this goal individually. Subsequently, it requires total commitment of all departments and a proactive approach towards integrated asset management. Maintaining multi-million dollar pipeline assets is not an easy task and the costs involved are enormous. This paper describes an adaptive approach for an Integrated Maintenance Management System where the maintenance strategies are directed to where they will most benefit the safety, environmental and business goals of the asset.
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Boyer, Jeffrey L., Mehdi Jalayerian, Andrew Silverstein, and Mohamad T. Araji. "Systems Integration for Cost Effective Carbon Neutral Buildings: A Masdar Headquarters Case Study." In ASME 2010 4th International Conference on Energy Sustainability. ASMEDC, 2010. http://dx.doi.org/10.1115/es2010-90335.
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Essential to the development of a low carbon economy will be the advancement of building product and process to reduce the capital and whole lifecycle cost of low, zero and net-positive energy buildings to allow these structures to be realized at a greater rate. On the whole, the built environment is responsible for one of the largest fractions of global energy consumption and thus anthropomorphic climate change, a result of the greenhouse gas emissions from power generation. When one also considers the energy required to design, fabricate, transport and construct the materials necessary to bring new building stock online, keeping pace with the rapid trend towards urbanization, the importance of the built environment in the energy sustainability equation is clearly evident. Yet, while technologically feasible, the realization of carbon neutral buildings is encumbered by the perception of increased annualized costs for operation and a greater upfront investment. This paper will review the design case of the Masdar International Headquarters, the flagship building of the net-zero carbon emission Masdar city currently being developed within the Abu Dhabi Emirates. Specifically, how an integrated approach enabled by computer simulation early within the design process allowed for improvements in economy and efficiency, setting a model for future high performance buildings. The five-story, 89,040-square-meter office building will incorporate eleven sculpted glass environmental towers to promote natural ventilation and introduce daylight to the interior of the building. These towers will also serve as the structural support for one of the world’s largest building integrated photovoltaic arrays, sized to supply 103% of the building’s total annual energy requirements while protecting the building and roof garden from intense heat and solar gains. Moreover, by integration into a separate structural trellis system, clean energy can potentially be generated to offset construction requirements while dually shading workers below during the heat of the day. This, along with other key sustainability design strategies such as a solar powered central district cooling system, thermoactive foundation piling, underfloor air distribution, desiccant dehumidification, a nanotechnology enabled building envelope and smart grid enabled facilities management infrastructure will allow the Masdar Headquarters to reach carbon neutrality within a decade, allowing for the remaining century of its operation to serve as a platform for clean energy generation.
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Demetriou, Dustin W., Vinod Kamath, and Howard Mahaney. "Understanding the True Total Cost of Ownership of Water Cooling for Data Centers." In ASME 2015 International Technical Conference and Exhibition on Packaging and Integration of Electronic and Photonic Microsystems collocated with the ASME 2015 13th International Conference on Nanochannels, Microchannels, and Minichannels. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/ipack2015-48152.
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The generation-to-generation IT performance and density demands continue to drive innovation in data center cooling technologies. For many applications, the ability to efficiently deliver cooling via traditional chilled air cooling approaches has become inadequate. Water cooling has been used in data centers for more than 50 years to improve heat dissipation, boost performance and increase efficiency. While water cooling can undoubtedly have a higher initial capital cost, water cooling can be very cost effective when looking at the true lifecycle cost of a water cooled data center. This study aims at addressing how one should evaluate the true total cost of ownership for water cooled data centers by considering the combined capital and operational cost for both the IT systems and the data center facility. It compares several metrics, including return-on-investment for three cooling technologies: traditional air cooling, rack-level cooling using rear door heat exchangers and direct water cooling via cold plates. The results highlight several important variables, namely, IT power, data center location, site electric utility cost, and construction costs and how each of these influence the total cost of ownership of water cooling. The study further looks at implementing water cooling as part of a new data center construction project versus a retrofit or upgrade into an existing data center facility.
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van Wyngaarden, Robert, and Mel VanderWal. "Managing GIS and Spatial Data to Support Effective Decision Making Throughout the Pipeline Lifecycle." In 2006 International Pipeline Conference. ASMEDC, 2006. http://dx.doi.org/10.1115/ipc2006-10472.
Full textAbstract:
Many pipeline industry managers and senior officials intuitively understand that location is important to most aspects related to pipelines throughout the life-cycle — from project concept, through construction and operations and finally to decommissioning. However, many organizations are not taking full advantage of location as being a vital component to support business decision-making across the entire range of activities undertaken by pipeline companies. A Geographic Information System (GIS) is a tool that takes advantage of geography. GIS is ideally suited for the storage, display, and output of geographic data, and moreover, the analysis and modeling of geographic data. While GIS has been around as a technology for over 30 years it is only in the last several years that it has started to be extensively used within the pipeline industry. Most managers have heard about GIS. Many organizations have already started to implement GIS and CAD-based solutions through individual projects and with a technical focus of automating work flows or business processes such as generating alignment sheets, regulatory compliance, integrity management, and land management to name a few. Given that many of these applications tend to be stand-alone or isolated developments, pipeline companies need to look at the complete spatial environment of all potential tools and applications, and support this with a vision of a common spatial data warehouse in a holistic sense. Any company that embraces a continuous gathering of spatial data throughout the pipeline life-cyle will have a significant knowledge base whose value will increase over time. A spatial data warehouse of truly integrated environmental, engineering and socioeconomic factors related to a pipeline during the entire lifecycle will have a total value that transcends the value of the individual factors. The Return on Investment (ROI) of a properly developed GIS framework and spatial data warehouse looking at all operational demands and support applications will certainly be many times over the original expenditure as measured in cost savings as well as better decision making. This paper will present insights and approaches into how to properly and effectively leverage the spatial data asset and in deploying GIS throughout the enterprise. These include addressing all of the elements that are key in implementing GIS — hardware, software, data, people and methods — as well as considering some of the ROI and value-based measures for GIS success.
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Abd El-Aziz, Khalid M., Jihun Kim, Karim Hamza, Mohamed El Morsi, Ashraf O. Nassef, Sayed M. Metwalli, and Kazuhiro Saitou. "Cost Optimization of a Solar Humidification-Dehumidification Desalination System Augmented by Thermal Energy Storage." In ASME 2015 International Design Engineering Technical Conferences and Computers and Information in Engineering Conference. American Society of Mechanical Engineers, 2015. http://dx.doi.org/10.1115/detc2015-46785.
Full textAbstract:
Solar-powered water desalination is one of the promising approaches for addressing fresh water scarcity in the Middle-East, North Africa, and areas of similar climate around the world. Humidification-dehumidification (HDH) is a scalable, commercially-viable technology that primarily utilizes thermal energy in order to extract fresh water from a high salinity water source. Because of inherent variability and uncertainty in solar energy availability due to daily and seasonal cycles, solar-powered HDH desalination systems may benefit from installing thermal energy storage (TES). TES can allow higher utilization of the installed system components and thus reduce the overall lifecycle cost of fresh water production. This work presents a configuration for a HDH desalination system augmented by TES. The system is optimized using Genetic Algorithms (GA) for minimum total annual cost (TAC) per unit volume of produced potable water while satisfying a preset potable water demand. The optimum results for the same location and cost function are compared with results from a previous system which does not have TES. The comparison shows a considerable reduction in potable water production cost when TES is utilized in addition to the benefit of smaller variation in water production across the day.