Дисертації з теми "Handling operations"
Оформте джерело за APA, MLA, Chicago, Harvard та іншими стилями
Ознайомтеся з топ-50 дисертацій для дослідження на тему "Handling operations".
Біля кожної праці в переліку літератури доступна кнопка «Додати до бібліографії». Скористайтеся нею – і ми автоматично оформимо бібліографічне посилання на обрану працю в потрібному вам стилі цитування: APA, MLA, «Гарвард», «Чикаго», «Ванкувер» тощо.
Також ви можете завантажити повний текст наукової публікації у форматі «.pdf» та прочитати онлайн анотацію до роботи, якщо відповідні параметри наявні в метаданих.
Переглядайте дисертації для різних дисциплін та оформлюйте правильно вашу бібліографію.
Chabot, Thomas. "Material handling optimization in warehousing operations." Doctoral thesis, Université Laval, 2018. http://hdl.handle.net/20.500.11794/36277.
Повний текст джерелаLes activités de distribution et d’entreposage sont des piliers importants de la chaîne d’approvisionnement. Ils assurent la stabilité du flux de matières et la synchronisation de toutes les parties prenantes du réseau. Un centre de distribution (CD) agit comme un point de découplage entre l’approvisionnement, la production et les ventes. La distribution comprend un large éventail d’activités visant à assurer la satisfaction de la demande. Ces activités passent de la réception au stockage des produits finis ou semi-finis, à la préparation des commandes et à la livraison. Les opérations d’un CD sont maintenant perçues comme des facteurs critiques d’amélioration. Elles sont responsables de la satisfaction d’un marché en évolution, exigeant des délais de livraison toujours plus rapides et plus fiables, des commandes exactes et des produits hautement personnalisés. C’est pourquoi la recherche en gestion des opérations met beaucoup d’efforts sur le problème de gestion des CDs. Depuis plusieurs années, nous avons connu de fortes avancées en matière d’entreposage et de préparation de commandes. L’activité de préparation de commandes est le processus consistant à récupérer les articles à leur emplacement de stockage afin d’assembler des commandes. Ce problème a souvent été résolu comme une variante du problème du voyageur de commerce, où l’opérateur se déplace à travers les allées de l’entrepôt. Cependant, les entrepôts modernes comportent de plus en plus de familles de produits ayant des caractéristiques très particulières rendant les méthodes conventionnelles moins adéquates. Le premier volet de cette thèse par articles présente deux importants et complexes problèmes de manutention des produits lors de la préparation des commandes. Le problème de préparation des commandes a été largement étudié dans la littérature au cours des dernières décennies. Notre recherche élargit le spectre de ce problème en incluant un ensemble de caractéristiques associées aux installations physiques de la zone de prélèvement, comme les allées étroites, et aux caractéristiques des produits (poids, volume, catégorie, fragilité, etc.). Une perspective plus appliquée à la réalité des opérations est utilisée dans notre développement d’algorithmes. Les déplacements liés à la préparation des commandes sont fortement influencés par le positionnement des produits. La position des produits dans la zone de prélèvement est déterminée par une stratégie d’affectation de stockage (storage assignment strategy). Beaucoup de ces stratégies utilisent de l’information sur les ventes des produits afin de faciliter l’accès aux plus populaires. Dans l’environnement concurrentiel d’aujourd’hui, la durée de vie rentable d’un produit peut être relativement courte. Des promotions peuvent également être faites pour pousser différents produits sur le marché. Le positionnement fourni par la stratégie d’hier ne sera probablement plus optimal aujourd’hui. Il existe plusieurs études mesurant l’impact d’une bonne réaffectation de produits sur les opérations de prélèvement. Cependant, ils étudient la différence des performances avec les positionnements passés et actuels. La littérature démontre clairement que cela apporte des avantages en termes d’efficacité. Toutefois, les déplacements nécessaires pour passer d’une position à une autre peuvent constituer une activité très exigeante. Ceci constitue le second volet de cette thèse qui présente des avancées intéressantes sur le problème de repositionnement des produits dans la zone de prélèvement. Nous présentons le problème de repositionnement des produits sous une forme encore peu étudiée aux meilleurs de nos connaissances : le problème de repositionnement. Plus précisément, nous étudions la charge de travail requise pour passer d’une configuration à l’autre. Cette thèse est structuré comme suit. L’introduction présente les caractéristiques et les missions d’un système de distribution. Le chapitre 1 fournit un survol de la littérature sur les principales fonctions d’un centre de distribution et met l’accent sur la préparation des commandes et les décisions qui affectent cette opération. Le chapitre 2 est consacré à l’étude d’un problème de préparation de commandes en allées étroites avec des équipements de manutention contraignants. Dans le chapitre 3, nous étudions un problème de préparation des commandes où les caractéristiques des produits limitent fortement les routes de prélèvement. Le chapitre 4 présente une variante du problème de repositionnement (reassignment) avec une formulation originale pour le résoudre. La conclusion suit et résume les principales contributions de cette thèse. Mots clés : Préparation des commandes, entreposage, problèmes de routage, algorithmes exacts et heuristiques, réaffectation des produits, manutention.
Distribution and warehousing activities are important pillars to an effective supply chain. They ensure the regulation of the operational flow and the synchronization of all actors in the network. Hence, distribution centers (DCs) act as crossover points between the supply, the production and the demand. The distribution includes a wide range of activities to ensure the integrity of the demand satisfaction. These activities range from the reception and storage of finished or semi-finished products to the preparation of orders and delivery. Distribution has been long seen as an operation with no or low added value; this has changed, and nowadays it is perceived as one of the critical areas for improvement. These activities are responsible for the satisfaction of an evolving market, requiring ever faster and more reliable delivery times, exact orders and highly customized products. This leads to an increased research interest on operations management focused on warehousing. For several years, we have witnessed strong advances in warehousing and order picking operations. The order picking activity is the process of retrieving items within the storage locations for the purpose of fulfilling orders. This problem has long been solved as a variant of the travelling salesman problem, where the order picker moves through aisles. However, modern warehouses with more and more product families may have special characteristics that make conventional methods irrelevant or inefficient. The first part of this thesis presents two practical and challenging material handling problems for the order picking within DCs. Since there are many research axes in the field of warehousing operations, we concentrated our efforts on the order picking problem and the repositioning of the products within the picking area. The order picking problem has been intensively studied in the literature. Our research widens the spectrum of this problem by including a set of characteristics associated with the physical facilities of the picking area and characteristics of the product, such as its weight, volume, category, fragility, etc. This means that a more applied perspective on the reality of operations is used in our algorithms development. The order picking workload is strongly influenced by the positioning of the products. The position of products within the picking area is determined by a storage assignment strategy. Many of these strategies use product sales information in order to facilitate access to the most popular items. In today’s competitive environment, the profitable lifetime of a product can be relatively short. The positioning provided by yesterday’s assignment is likely not the optimal one in the near future. There are several studies measuring the impact of a good reassignment of products on the picking operations. However, they study the difference between the two states of systems on the picking time. It is clear that this brings benefits. However, moving from one position to another is a very workload demanding activity. This constitutes the second part of this thesis which presents interesting advances on the repositioning of products within the picking area. We introduce the repositioning problem as an innovative way of improving performance, in what we call the reassignment problem. More specifically, we study the workload required to move from one setup to the next. This thesis is structured as follows. The introduction presents the characteristics and missions of a distribution system. Chapter 1 presents an overview of the literature on the main functions of a DC and emphasizes on order picking and decisions affecting this operation. Chapter 2 is devoted to the study of a picking problem with narrow aisles facilities and binding material handling equipment. In Chapter 3, we study the picking problem with a set of product features that strongly constrain the picking sequence. Chapter 4 presents a variant of the reassignment problem with a strong and new formulation to solve it. The conclusion follows and summarizes the main contributions of this thesis. Key words: Order-picking, warehousing, routing problems, exact and heuristic algorithms, products reassignment, material handling.
Conde, Carvalhal Carlos. "Safety Optimization of Material Handling Forklift Truck Operations." Thesis, KTH, Industriell produktion, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-280832.
Повний текст джерелаAtt förebygga incidenter och skador är grundläggande för all branschaktivitet eftersom dessa händelser kan leda till allvarliga ekonomiska, miljömässiga och mänskliga förluster. På grund av centraliseringen av Lindes fyllningsverksamheten inom Sverige har flera av deras anläggningar fasats ut för att flytta produktionen till Enköping. Den utökade produktionen på Linde Enköping skapade behov av fler truckförare, högre lagernivåer och ökade följaktligen antalet incidenter relaterade till gaffeltruck. Avhandlingen syftar till att få kunskap för att mildra säkerhetsrisker för gaffeltruckar samt förstå hur man kan eliminera risker och osäkra situationer vid denna typ av verksamhet. Detta projekt delades in i tre faser. Fas I bestod av att förstå driftsrutiner och dess säkerhetsrisker, utvärdera det interna tillståndet på Linde Enköpings arbetsplats (med en säkerhetsundersökning, flera besök och olika intervjuer) och benchmarka de vanligaste metoderna baserat på andra företags gaffeltruckrelaterade processer (med besök och intervjuer). I fas II, parallellt med I-Site-programvaruimplementering, utfördes studier med olika tekniska verktyg (Spaghetti Diagram, VSM, Fishbone Diagram och FMEA) för att undersöka och förstå hur man optimerar verksamhetens gaffeltruckrelaterade säkerhet. I denna fas utvecklades en skräddarsydd observations-KPI för att utvärdera verksamheten oberoende av att mäta incidenter avseende fyra grupper: Plats, fotgängare, gaffeltruck och beteende för gaffeltruck. I fas III diskuterades alla förvärvade data, slutsatser gjordes baserade på dataanalysen och diskussionerna om resultaten av fas II-implementering tillsammans med teoretiska referenser. Undersökningsresultaten visade hur högt säkerhet prioriteras vid Linde Enköping. Den avslöjade också, utöver alla tillämpade konstruktionsverktyg, vilka element som bör fokuseras på för att optimera truckens driftssäkerhet (främst relaterad till teknikdimension). Baserat på den benchmarking som genomfördes är det möjligt att hävda att frånvaron av underhållsanläggning är den största nackdelen med Linde i Enköping. Däremot är användningen av mjukvara för I-Site-flottanhantering ett viktigt steg mot säkerheten. Kunskapen om I-SITE och medvetenheten om dess fördelar växte bland ledningen och operatörerna när installationsproblem och tekniska funktionsfel eliminerades. Utfallen för observations-KPI har erhållit preliminära totalvärden över 0,82 för alla grupper (i en skala från 0 till 1), och visar sig kapabel att mäta säkerhet i genomförande samt att identifiera risker och osäkra situationer.
Almeida, Miguel Alexandre Dias. "Planning, operations and data handling of planetary science missions." Master's thesis, FCT-UNL, 2011. http://hdl.handle.net/10362/7081.
Повний текст джерелаSince the dawn of human kind the celestial sphere has had a special place in our imagination. I always felt the same passion for the cosmos. In particular, fuelled by the journeys of discovery of the Solar System, I always dreamed of dedicating myself to planetary exploration. To follow that idea I studied physics and, in 1999, I finally got the opportunity to work in Planetary Science research. It all started in the Lisbon Observatory, where I was able to analyse infrared data from the Jupiter orbiter, Galileo, collected by its Near-Infrared Mapping Spectrometer (NIMS). At this stage I learned some methods used in data analysis. I continued my career in the European Space Agency in the Science Planning of the SMART-1 lunar spacecraft. I remained in this mission for the following seven years, and saw my responsibilities grow. I started by giving technical support to the Project Scientist. By the end of the mission I had been a major player in the setup of the planning system, and worked in all capacities within the SMART-1 Science and Technology Operations Centre, and the Advanced Moon Micro-Imager Experiment (AMIE). Finally, in 2006, I started working in the Venus Express project as a Liaison Scientist for the Venus Monitoring Camera (VMC) instrument. I was able to re-work the VMC planning system with the Principal Investigator in order to gather more valuable science data. While this optimization was done, and since the spacecraft was already orbiting Venus, my duties also included, and still do, to plan and operate the VMC camera. During my entire career I have had two side projects running along my main tasks. I always had an interest for innovation and some of my ideas developed to integral parts of my main projects. I also always kept an interest in data analysis, as time permitted, that I carried with NIMS, AMIE and VMC.
Chung, Carl Yuk Kay. "Managing ramp operations at airport : issues, models and solution methods /." View abstract or full-text, 2005. http://library.ust.hk/cgi/db/thesis.pl?IEEM%202005%20CHUNG.
Повний текст джерелаLopes, Octávio Antunes. "RFID and the internet of things in freight and handling operations." Master's thesis, Instituto Superior de Economia e Gestão, 2010. http://hdl.handle.net/10400.5/2225.
Повний текст джерелаRFID technology (Radio Frequency IDentification) is an automatic identification method relying on storing and remotely retrieving data using devices (RFID tags or transponders) enabling the contactless identification of objects. RFID has been around for decades but only during the last years has become one of the most promising research areas with more and more attention focused on it. The retail sector had been leading the way with logistics applications, followed by some government agencies with identification systems and by different sectors of activity (pharmaceuticals, aircraft manufacturing, etc). Together with the last technological developments, new ideas and concepts are generating new paradigms as the "Internet of Things". The "Internet of Things" can be described as "Things having identities and virtual personalities operating in smart spaces using intelligent interfaces to connect and communicate within social, environmental, and user contexts ".1 Also during the last decades, air transportation has become more and more important for people mobility and goods transportation in the global economy environment. According to IATA , RFID can be used as a way to improve a range of airline business processes while cutting costs. IATA had developed a standard for RFID baggage tags and recommended practices and business cases for the use of RFID in baggage handling. With this study it is planed to analyse the situation in the two main airports in Portugal (Lisbon and Oporto), based in Portway ground handling operations, compare it with some actual developments, the E-Cab Project and IATA proposals and recommendations, and to evaluate scenarios and their feasibility in a near future.
A tecnologia RFID (Radio Frequency IDentification) é um método de identificação automático de armazenamento e recuperação remota de informação, recorrendo a dispositivos (etiquetas ou transmissores-receptores RFID) que permitem a sua leitura à distância e sem necessidade de qualquer contacto directo com os objectos. Sendo uma tecnologia já com décadas de existência, só durante os últimos anos é que se tem evidenciado como uma das mais promissoras , captando cada vez mais atenção por parte dos diversos actores. O sector de retalho tem vindo a promover a sua divulgação, liderando o desenvolvimento de diversas aplicações logísticas e sendo seguido, durante os últimos anos, por algumas agências governamentais com o desenvolvimento de sistemas de identificação e por diversos outrossectores de actividade (farmacêutica, construção aeronáutica, etc). Em simultâneo com os mais recentes progressos tecnológicos e com o desenvolvimento de conceitos mais inovadores, um novo paradigma tem aparecido com a designação da "Internet dos Objectos". A "Internet dos Objectos" pode ser descrita como "objectos possuindo identidades e personalidades virtuais operando em espaços inteligentes usando interfaces inteligentes para ligar e comunicar em contextos sociais, ambientais e no seio dos utilizadores". Também durante as últimas décadas, o transporte aéreo tem vindo a desempenhar um papel cada vez mais importante para a mobilidade das populações e para o transporte de mercadorias no ambiente da economia global. De acordo com a IATA, as tecnologias RFID poderão vir a ser utilizadas com sucesso, reduzindo custos e melhorando um vasto conjunto de processos correntes no sector, tendo já desenvolvido alguns normativos e recomendações relativas à aplicação de etiquetas RFID na identificação e monitorização de bagagem. Com este trabalho pretende-se analisar a situação nos dois principais aeroportos Portugueses (Lisboa e Porto), baseada nas operações de handling da Portway, comparar os resultados obtidos com os desenvolvimentos actuais resultantes do Projecto E-Cab e com as propostas e recomendações da IATA, avaliando cenários e a possibilidade da sua concretização num futuro próximo.
Setty, Prashant (Prashant Neelappanavara). "Optimal handling of Highly Active Pharmaceutical Ingredients during milling and blending operations." Thesis, Massachusetts Institute of Technology, 2013. http://hdl.handle.net/1721.1/81020.
Повний текст джерелаCataloged from PDF version of thesis.
Includes bibliographical references (p. 32-33).
This thesis investigates best practices for Highly Active Pharmaceutical Ingredient (HAPI) milling and blending. We utilize a qualitative analysis centering on a benchmarking study and quantitative analyses using a probabilistic capacity simulation and tradeoff methodology. The analyses indicate that the growing number of HAPI products in a manufacturer's portfolio may result in capacity constraints. Therefore, we recommend that manufacturers pursue process improvement technologies. Suggested process improvements include implementing online particle size measurement and Wash in Place (WIP) and Clean in Place (CIP) cleaning systems. Online particle size measurement allows for better process control and eliminates the need for HAPI blending for homogenization. Automated WIP and CIP systems decrease changeover time and allow for higher equipment availability. Additionally, the results of the analyses suggest that manufacturers consider standardizing transportation containers with the upstream vendors and downstream consumers. Lastly, from an organizational standpoint, we recommend that manufacturers include both subject matter experts and operations personnel when developing and implementing internal guidelines so as to ensure the guidelines are practical and uniformly applied.
by Prashant Setty.
S.M.
M.B.A.
Park, Byung Chun. "Analytical models and optimal strategies for automated storage/retrieval system operations." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/24568.
Повний текст джерелаReichart, Christiane. "Materials handling in hospitals: an analysis of how the storage and materials handling system can be improved, using the example of Hospital Santa Maria." Master's thesis, NSBE - UNL, 2010. http://hdl.handle.net/10362/10277.
Повний текст джерелаWarehousing costs and especially order picking costs account for a considerable amount of total logistics costs, what leads to the purpose of this paper which is to elaborate means by which the materials handling process of hospitals can be improved. A detailed analysis of the material storage and picking process at Hospital Santa Maria is carried out in order to demonstrate best practices as well as main limitations for which solutions are developed. The findings are that the introduction of within-aisle storage, electric foldable picking vehicles and pick-by-voice system in combination with the Japanese concept Kaizen can improve warehouse operations drastically.
Genser, Bradley Philip. "Optimizing procurement and handling costs in a utility." Thesis, Massachusetts Institute of Technology, 2014. http://hdl.handle.net/1721.1/90758.
Повний текст джерелаThesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2014. In conjunction with the Leaders for Global Operations Program at MIT.
10
Cataloged from PDF version of thesis.
Includes bibliographical references (page 111).
We propose a novel method to quantify the cost of activities involved in the picking portion of order fulfillment. We adapt the general method of picking cost quantification to the specific situation of TP&G, a publicly held utility, to build a simulation model which calculates total cost (procurement purchasing costs + material handling costs) across TP&G's Construction Materials Supply Chain (CMSC) . We use the simulation model to demonstrate the effect of case pack quantities and various disputed (within TP&G) material handling policies on supply chain costs. Finally. we move beyond the descriptive results of the simulation model and build optimization models for a case where a single case pack quantity is held in inventory, under conditions of both deterministic and stochastic demand. We show that case pack quantity held in inventory greatly impacts supply chain costs. We also find the novel result that the optimal material picking policy for both deterministic and stochastic demand is a threshold policy whereby orders should be fulfilled with whole case packs up to the highest possible multiple of case pack quantity that does not exceed an ordered quantity. If the remainder of an order to be fulfilled exceeds a certain number of units in a case pack, that remainder should be fulfilled with a whole case pack (overfilled). This threshold can be efficiently calculated for all case pack quantities (optimal or not).
by Bradley Philip Genser.
M.B.A.
S.M.
Carlson, Valerie, and Bénédicte Lindblom. "Airport ground operations through the lens of human-technology systems : a descriptive case study of ground operations at a Swedish airport." Thesis, KTH, Ergonomi, 2020. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-291871.
Повний текст джерелаZhang, Lu, and 張露. "A genetic approach to simultaneous scheduling of container handling operations in a container terminal." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2009. http://hub.hku.hk/bib/B42841264.
Повний текст джерелаZhang, Lu. "A genetic approach to simultaneous scheduling of container handling operations in a container terminal." Click to view the E-thesis via HKUTO, 2009. http://sunzi.lib.hku.hk/hkuto/record/B42841264.
Повний текст джерелаWong, Man-ying, and 黃文英. "A manual handling operations training program for healthcare workers in preventing back pain and injury." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2010. http://hub.hku.hk/bib/B44626605.
Повний текст джерелаPrimack, Willow. "Analysis and productivity improvement of an automated material handling system through simulation." Thesis, Massachusetts Institute of Technology, 2015. http://hdl.handle.net/1721.1/99026.
Повний текст джерелаThesis: S.M., Massachusetts Institute of Technology, Department of Mechanical Engineering, 2015. In conjunction with the Leaders for Global Operations Program at MIT.
Cataloged from PDF version of thesis.
Includes bibliographical references (pages 66-67).
As Amazon.com has grown, the company has invested in warehouse systems similar to those traditionally found in manufacturing. These systems are a complex and interconnected set of manned work processing stations linked together by conveyance. This thesis examines one such system, arranged as a set of parallel single piece workflow lines joined by a central computerized sorter that route work between lines, and examines the effect of sorter algorithms and line capacity on production output. Work studies, interviews, and a practical experiment suggest a deterioration in the feedback provided to the central sorter for work routing. A Monte Carlo simulation model of the system further supports this hypothesis, suggesting that system throughput is 11.7% lower than a system that perfectly routes work to line in a pull fashion. While perfect routing is not practically feasible, the thesis then explores two routing heuristics designed around starvation response and dynamic capacity analysis, which simulation suggest may yield a 6.73% increase in throughput. In doing so, the thesis provides a case study on process improvement using simulation to characterize a complicated mechanical production system that is otherwise analytically intractable.
by Willow Primack.
M.B.A.
S.M.
Gallo, Antonio. "Magnetic field sensors suitable for high temperature and vacuum operations and for remote handling in harsh environment." Doctoral thesis, Università degli studi di Padova, 2011. http://hdl.handle.net/11577/3427514.
Повний текст джерелаNell’ambito delle tecnologie alternative per la produzione di energia la fusione termonucleare controllata appare la più promettente allo scopo di diminuire la dipendenza mondiale dai combustibili fossili quali il petrolio e il carbone. La ricerca sulla fusione mira allo sviluppo di una nuova fonte energetica nel medio termine e dovrebbe trovare ingegnerizzazione nella seconda metà di questo secolo, affiancando le attuali tecnologie. La ricerca sui tokamak quali JET e ITER e il futuro DEMO, basata sul confinamento del plasma attraverso l’utilizzo di campi magnetici, appare allo stato attuale la più promettente e dovrebbe fornire risultati importanti già nei prossimi due decenni. Nell’ambito della fusione termonucleare controllata grande importanza rivestono le diagnostiche magnetiche, che forniscono informazioni fondamentali sullo stato del plasma e permettono un controllo attivo sulla posizione e la forma dello stesso. Questa tesi si occupa dell’ideazione, sviluppo e produzione di due nuove tipologie di sensori magnetici, adatti al funzionamento in ambienti ostili quali l’interno della camera da vuoto (vessel) di ITER. Tali sensori sono stati ideati per resistere ad alte temperature e ad intensi bombardamenti neutronici e dovranno essere installati dietro la prima parete del vessel, a contatto dello stesso. Si tratta di sensori per campi magnetici aventi una frequenza compresa tra 0.001Hz e 10kHz. La tesi è così strutturata: • Il capitolo 1 fornisce una visione di massima sul problema energetico e descrive i rudimenti teorici della fusione nucleare • Il capitolo 2 introduce il problema delle diagnostiche magnetiche elencando i tipi di sensori utilizzati in macchine esistenti (JET, RFX-mod, JT60), con un approfondimento delle problematiche relative ad ITER • Il capitolo 3 descrive lo sviluppo e la produzione di diversi set di sensori costruiti utilizzando la tecnologia LTCC. Tale capitolo elenca i test e le analisi micrografiche effettuate • Il capitolo 4 descrive lo sviluppo e la costruzione di una serie di sensori costruiti mediante la tecnologia del cavo avvolto usando cavi in rame con isolamento in fibra di vetro denominati POZh • Il capitolo 5 descrive il progetto di una struttura necessaria al supporto di tali sensori (LTCC/POZh) all’interno del vessel di ITER
Fitouri, Trabelsi Salma. "Contribution to the organization of ground handling management at airports." Thesis, Toulouse, INPT, 2013. http://www.theses.fr/2013INPT0118/document.
Повний текст джерелаThe increase of the world air traffic growth of the last decades has generated a permanent challenge for civil aviation authorities, airlines and airports to supply sufficient capacity to provide a safe transportation service with acceptable quality standards. New traffic management practices, such as A-CDM, based on multi-agent and collaborative decision making concepts have been introduced at airports. However, within the turnaround process of aircraft at airports, ground handling management of aircraft has not been developed specifically in the A-CDM approach, even if it has an important role in the fluidity of aircraft operations at airports. The main objective of this thesis dissertation is to contribute to the organisation of the ground handling management at airports. It consists to provide a structure organize the ground handling management compatible with the A -CDM concept. The proposed structure introduces a ground handling coordinator (GHC) which is considered as an interface for communication between the partners of the A -CDM and the different ground handling managers (GHM). This hierarchical structure allows sharing information with partners in the A -CDM on the one side and on the other side, interacting with ground handling managers (GHM). Decision making processes based on heuristics have been developed at each level of the proposed organization and have been also evaluated in the case of nominal conditions and in the case of the presence of major disruptions
Mäkinen, Emanuel, and Ellen Broström. "Competitive logistics management : Guidelines for handling logistical challenges in chain store warehouses." Thesis, Högskolan i Borås, Akademin för textil, teknik och ekonomi, 2016. http://urn.kb.se/resolve?urn=urn:nbn:se:hb:diva-10201.
Повний текст джерелаGIAMMUSSO, CALOGERO. "Analisi dell’inquinamento atmosferico prodotto dalle operazioni aeroportuali e impiego di soluzioni energetiche innovative secondo il paradigma del “Hydrogen Airport”." Doctoral thesis, Politecnico di Torino, 2013. http://hdl.handle.net/11583/2507379.
Повний текст джерелаAlonso, Tabares Diego. "Contribution à l'automatisation des opérations au sol des aéroports." Thesis, Toulouse 3, 2018. http://www.theses.fr/2018TOU30225.
Повний текст джерелаLa durabilité du transport aérien est basée sur le bon déroulement de la manutention des avions. Le manque de main d’œuvre et les conditions existantes sur l’industrie de la manutention au sol fait que l’innovation et l’automatisation sont la seule façon de maintenir le rythme de croissance actuel. Cette recherche présente l’état de l’art de la manutention au sol des avions, identifie les défis à résoudre pour parvenir à des opérations au sol sécurisées, efficaces et respectueuses de l’environnement. La meilleure opportunité est dans l’accostage automatique des matériels au sol à l’avion, avec des véhicules autonomes qui vont évoluer autour de l’avion et des systèmes automatisés dans l’avion lui-même. La formulation du problème pour l’allocation des ressources pour la manutention au sol des avions dans le cadre totalement automatisé est entreprise. Des solutions en ligne pour le problème d’assignation des flottes sont proposées et appliquées dans un aéroport
Ndeanaefo, Aloysius Okey. "Priests' Perceptions of the Leadership Styles of U.S. Catholic Bishops." ScholarWorks, 2018. https://scholarworks.waldenu.edu/dissertations/5506.
Повний текст джерелаLandbø, Anders Richard. "From Newbuilding to Operation : Information Handling in Ship Management." Thesis, Norges teknisk-naturvitenskapelige universitet, Institutt for marin teknikk, 2010. http://urn.kb.se/resolve?urn=urn:nbn:no:ntnu:diva-11586.
Повний текст джерелаChittratanawat, Sarawoot. "Operation based facilities design /." free to MU campus, to others for purchase, 2001. http://wwwlib.umi.com/cr/mo/fullcit?p3025611.
Повний текст джерелаZhao, Changhui. "Strategic and operational plan for better material handling." Thesis, Massachusetts Institute of Technology, 2008. http://hdl.handle.net/1721.1/46544.
Повний текст джерелаIncludes bibliographical references (leaf 65).
Currently the material handling in NPC Singapore is done manually via forklift trucks. As the production volume increases and a new product launches, the current capacity will not be sufficient for 2012. In order to avoid the production loss and increase the operational efficiency, four solutions have been tested, including forklift trucks and labor extension, Kanban redesign in staging areas, conveyor implementation in staging areas and automating the transportation between the warehouse and production via implementing AGVs or transfer cars. In this thesis research we specifically analyze the use of AGVs and transfer cars. By implementing two transfer cars in 2012, the system capacity will remain adequate until 2018. This investment provides a $364,165 net present value and a 29% internal rate of return.
by Changhui Zhao.
M.Eng.
Dong, Wenyan 1980. "Improved handling of the decoding operation in the Presto compiler." Thesis, Massachusetts Institute of Technology, 2004. http://hdl.handle.net/1721.1/33140.
Повний текст джерелаIncludes bibliographical references (leaves 62-63).
This thesis presents a research project on decoder related optimizations in HDL de- signs. The goal of the research is to improve design synthesis quality-of-result, mainly in terms of area; this involves sharing decoders driven by related inputs, and map decoders using fewer number of boolean gates. Algorithms presented in this thesis were implemented in the Presto HDL compiler. A series of tests were conducted using real-world HDL designs in order to determine how effective these optimizations are.
by Wenyan Dong.
M.Eng.and S.B.
STRÖM, CHRISTIAN. "Adapting Value Stream Mapping to Circular Product Flows. : From Manufacturing to Equipment Rental." Thesis, KTH, Skolan för industriell teknik och management (ITM), 2019. http://urn.kb.se/resolve?urn=urn:nbn:se:kth:diva-263156.
Повний текст джерелаDen ökande utbredningen av delningsekonomi tvingar industrier att gå från traditionella linjära affärsmodeller mot cirkulära (Schuttelaar & Partners, 2019). Utöver denna förändring så ökar även trycket på lagerverksamheter som ett resultat av det ökande inflytandet av e-handel, Supply-Chainsamarbete och globalisering som kräver effektivare verksamheter med användning av mindre resurser än någonsin förut (Frazelle, 2016). Lean är ett koncept som har uppmärksammats som en filosofi för att hantera dessa förändringar, genom att åstadkomma mer med mindre resurser och därmed minska slöseri och att sträva efter ständiga förbättringar, vilket har varit framgångsrikt inom tillverkningssektorn. Svårigheterna med att översätta detta koncept till icke-repetitiva miljöer har bidragit till den begränsade appliceringen av lean inom industrier som byggnadskonstruktion. Där företag inom uthyrning av byggnadsmaskiner och utrustning har en ännu större utmaning, då deras verksamhet bygger på cirkulära produktflöden. Vilket orsakar komplex lagerhantering av många olika produkter i stora mängder. Avhandlingen har fokuserat på att analysera lagerflödet av kollektiva fallskyddsmedel i uthyrningsbranschen, från kundorder till kundreturer. Detta har möjliggjorts genom att utföra en anpassad värdeflödeskartläggning i ett nytt sammanhang, nämligen för företag inom uthyrning av byggnadsmaskiner och utrustning. Där värdeflödeskartläggning vanligtvis används inom tillverkning för att visuellt representera de aktiviteter som krävs för att en produkt ska kunna flytta genom produktions- och informationsflödena. Syftet med studien är att tillämpa värdeflödeskartläggning utanför tillverkningssektorn och att sammanfatta resultaten i form av förslag på förbättringar av hanteringen av icke-serienumrerade produkter inom uthyrningsbranschen. Ett samarbete med ett fallföretag inom uthyrningsindustrin har genomgåtts för att uppfylla syftet med studien. Tillsammans med fallföretaget har det föreslagna ramarbetet testats och utvärderats. Resultaten har följts upp genom att genomföra en returhanteringsstudie, som utförs av verksamma inom lager hanteringen för kollektiva fallskyddsmedel, studiens resultat har sedan varit föremål för en statistisk analys. Upptäckterna från värdeflödeskartläggningen användes som grund för returhanteringsstudien, som agerat medel för att verifiera eller avfärda dem. Dessa har sedan sammanfattas i förslag till förbättringar till fallföretaget och förslag till framtida åtgärder. Bland resultaten finns indikationer på längre hanteringstider för returer som inte är förvarnade innan de blir återlämnade, samt minskade hanteringstider för sorterade returer. Dessutom krävde tre produkttyper ofta reparationer, rengöring och skrotning jämfört med andra produkter, vilket tyder på att dessa produkter är mer tidskrävande vid returer. Företaget rekommenderas att arbeta med standardiseringsprocesser för returhantering i hela organisationen, mer specifikt inom bestämmelser för fakturering och produktlagring. Förslag till framtida forskning inom ämnesområdet presenteras även.
Wu, B. "An investigation into the operation of an Order-Handling-Manufacturing System." Thesis, Brunel University, 1988. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.384134.
Повний текст джерелаBoparai, Ramanpreet. "Integration of operation allocation and material handling in the design of flexible manufacturing systems." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2001. http://www.collectionscanada.ca/obj/s4/f2/dsk3/ftp04/MQ62188.pdf.
Повний текст джерелаMercer, Robert M. "Attitudes and perceptions of instructors operating marine simulator courses." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 1996. http://www.collectionscanada.ca/obj/s4/f2/dsk2/ftp04/MQ36155.pdf.
Повний текст джерелаHershberger, William K. "Improved questionnaire data handling and automated analysis capabilities for the MV-22 operational evaluation." Thesis, Monterey, Calif. : Springfield, Va. : Naval Postgraduate School ; Available from National Technical Information Service, 1999. http://handle.dtic.mil/100.2/ADA370796.
Повний текст джерела"September 1999". Thesis advisor(s): Lyn R, Whitaker. Includes bibliographical references (p. 95-96). Also available online.
Saptari, Adi. "PC computer based algorithm for the selection of material handling equipment for a distribution warehouse based on least annual cost and operating parameters." Ohio : Ohio University, 1990. http://www.ohiolink.edu/etd/view.cgi?ohiou1183473503.
Повний текст джерелаPaulo, Jorge. "A mathematical model of operation allocation and materials handling system selection problems in a flexible manufacturing system." Thesis, National Library of Canada = Bibliothèque nationale du Canada, 2000. http://www.collectionscanada.ca/obj/s4/f2/dsk1/tape4/PQDD_0015/MQ52629.pdf.
Повний текст джерелаDolley-Ryneveld, Mieshkah. "The effect of outsourcing a South African automotive company's material handling activities on its operational performance." Thesis, Nelson Mandela Metropolitan University, 2014. http://hdl.handle.net/10948/d1021202.
Повний текст джерелаBeque, Luciéli Tolfo. "Avaliação dos requisitos para teste de um sistema operacional embarcado." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2009. http://hdl.handle.net/10183/17799.
Повний текст джерелаSociety is increasingly dependent on embedded systems, which in most cases operate in an invisible manner to its users. This dependence makes the user vulnerable to risks due to failures that may occur. These failures can cause loss of lives or serious property and financial damage. Because of these facts, the quality of these products becomes a key point to have a stable system, free of errors and with all the features running. This testing is of essential importance to obtain a product with good quality. Due to the high cost of production and energy spent on tests, there is a need for further studies on different methods, to test an embedded system. In this context, this work aims at presenting the initial studies as the testing of the Embedded Operating System. The case study was focused on the exception handling routine of the eCos (Embedded Configurable Operating System), because it has a strong interaction between software and hardware, and this interaction is one of the main challenges encountered in testing embedded software. Therefore, this work aims at taking the first steps towards research related to testing an Embedded Operating System. After analyzing the experiments, it was noted that the main feature of the Embedded Operating System, eCos, the configurability, is an extra point of difficulty for the tests. It requires a detailed study of the code eCos, which is completely general, before the planning of tests, and could be spent much time in this activity. Another point is that the test becomes totally dependent on hardware. However, the experimental results presented for the case study of this study showed satisfactory.
Corwin, Matthew L. "A documentation and analysis of the physical, operating, and business environments for small-tree handling and harvesting." Thesis, Virginia Polytechnic Institute and State University, 1987. http://hdl.handle.net/10919/94498.
Повний текст джерелаM.S.
Swart, Marinda. "A Scheduling model for a coal handling facility [electronic resource] /." Diss., Pretoria : [s.n.], 2004. http://hdl.handle.net/2263/25388.
Повний текст джерелаDissertation (MEng (Industrial Engineering))--University of Pretoria, 2006.
Industrial and Systems Engineering
unrestricted
Ho, John Kin Lim. "Some object-oriented design and software control methods of a flexible material handling system, operating in a CIM environment." Thesis, University of East London, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.282914.
Повний текст джерелаSaada, Hajer. "Exploiting Model Transformation Examples for Easy Model Transformation Handling (Learning and Recovery)." Thesis, Montpellier 2, 2013. http://www.theses.fr/2013MON20223/document.
Повний текст джерелаModel Driven Engineering (MDE) considers models as first class artifacts. Each model conforms to another model, called its metamodel which defines its abstract syntax and its semantics.Various kinds of models are handled successively in an MDE development cycle. They are manipulated using, among others, programs called model transformations. A transformation takes as input a model in a source language and produces a model in a target language. The developers of a transformation must have a strong knowledge about the source and target metamodels which are involved and about the model transformation language. This makes the writing of the model transformation difficult.In this thesis, we address the problem of assisting the writing of a model transformation and more generally of understanding how a transformation operates.We adhere to the Model Transformation By example (MTBE) approach, which proposes to create a model transformation using examples of transformation. MTBE allows us to use the concrete syntaxes defined for the metamodels. Hence, the developers do not need in-depth knowledge about the metamodels. In this context, our thesis proposes two contributions.As a first contribution, we define a method to generate operational transformation rules from transformation examples. We extend a previous approach which uses Relational Concept Analysis as a learning technique for obtaining transformation patterns from 1-1 mapping between models. We develop a technique for extracting relevant transformation rules from these transformation patterns and we use JESS language and engine to make the rules executable. We also study how we better learn transformation rules from examples, using transformation examples separately or by gathering all the examples.The second contribution consists in recovering transformation traces from transformation examples. This trace recovery is useful for several purposes as locating bugs during the execution of transformation programs, or checking the coverage of all input models by a transformation. In our context, we expect also that this trace will provide data for a future model transformation learning technique. We first address the trace recovery problem with examples coming from a transformation program. We propose an approach, based on a multi-objective meta-heuristic, to generate the textit{many-to-many} mapping between model constructs which correspond to a trace. The fitness functions rely on the lexical and structure similarity between the constructs. We also refine the approach to apply it to the more general problem of model matching
Attravanam, Siddarth Kashyap. "Identifying Operating Conditions of Tires During Highway Driving Maneuvers." The Ohio State University, 2018. http://rave.ohiolink.edu/etdc/view?acc_num=osu1534456018582412.
Повний текст джерелаVogt, John Joseph. "The design principles and success factors for the operation of cross dock facilities in grocery and retail supply chains." Thesis, Stellenbosch : Stellenbosch University, 2004. http://hdl.handle.net/10019.1/50133.
Повний текст джерелаENGLISH ABSTRACT: The dissertation reflects the research done on the design principles and success factors for the operation of cross dock facilities in grocery and retail supply chains. The cross dock is a particular facility in the supply chain where goods are received from suppliers, sorted without storage of the goods, and then efficiently moved to downstream customers. Cross docks are not a new operation. However, the use in high volume grocery and retail operational capabilities is poorly understood and is not uniquely defined. The problem is that cross docks are often seen as extensions of warehouses. The same personnel, systems and processes are applied and the efficiency potential of the cross dock is not achieved. Warehouses are orientated towards storing the full range of product and allowing the pick to be done from this storage buffer to provide any or all of these products to a customer. Cross docks will only handle products that are used in larger quantities and that are sent to most, if not all, the customers. The cross dock is therefore distinct and very different from the traditional warehouse. The published research tends to focus on the technical aspects of the cross dock layout. This research is primarily in the scheduling of the trucks into the yard of the facility; the allocation of trucks to specific doors of the facility; and the allocation of doors to receiving and despatch functions within the facility. Very little information or research reflects the design principles and success factors for the cross dock and its supply chain. The only classification of the cross dock in the literature is whether the barcode is added to the item before or after receipt at the cross dock. For this research work a literature survey was conducted and five major operations were reviewed, in South Africa and the USA. The research empirically drew logical conclusions, which were tested in the operations and found to be correct. This allowed the design principles and success factors to be determined for a successful cross dock. The research extends the knowledge of the cross dock operation and design: - • A new classification for the feasible types of cross docks in the supply chain was developed. Three factors are shown to be of primary importance: - o Where in the supply chain the identification of specific items for a customer is done; o Where the sort is done for the items to be delivered to a customer; and o Whether the supplier is providing one product or multiple products to the sort. From these three factors, eight potential classifications could be defined. However, only three practical types of cross dock can be determined from these eight alternatives. These are named in this research as Cross Dock Managed Load (CML); Joint Managed Load (JML); and the Supplier Managed Load (SML). The cross dock is far more effective than the warehouse when the total work (excluding inventory) is considered. The earlier in the supply chain the product is identified for the use of the entire downstream supply chain, the more effective will be the total supply chain. Thus the greatest supply chain effectiveness possible is with the SML, then the JML and finally the CML. • The operation of a cross dock is very similar to a continuous manufacturing process. There is no buffer of stock to decouple the inbound and outbound processes, and the operation takes place in a restricted area. However, in the retail chain, the workload alters with different orders and different days. Daily load differences vary by as much as 90%. This results in vastly different workloads and variations of throughput. This is similar to a batch operation with highly variable workloads between batches. The literature recommends the use of Just in Time (JIT) practice for cross docks. This is inappropriate as its primary requirements are continuous full volume operation and continuous small improvements to achieve a balanced operation. The most appropriate method of process improvement is the Theory of Constraints (TO C) and not JlT. • The management must have a detailed, disciplined approach. This implies standardised methods of operation, and a high degree of training. Equally there is the requirement for a special type of personnel to operate the cross dock. These operating personnel must be able to operate with precision (i.e. very low error rates) and be able to maintain this capability for continuous periods. • The systems required for a successful operation must include the capabilities of Yard Management, WMS for cross docking, Order Management with Advanced Shipping Notice (ASN) capability and Track and Trace across the supply chain. The items need to be identified by a barcode. The information required on the barcode will be determined by. the information systems capability of the least advanced service provider in the supply chain. If this service provider can receive and transmit all the data required for the supply chain from and to the other members, then the barcode need only be an identification number of the specific item. The data pertaining to the items is then passed from system to system in the supply chain. If data movement is not possible between all the parties in the entire supply chain, then the barcode must contain the information that will identify the item, the origin and the final delivery destination. If the items are delivered as part of a consignment, a further quantum of information is required to identify the total number of items in the consignment and the specific item within the consignment. • The research shows that the overall capability of the cross dock or its maximum capacity is the combination of the capability of the personnel and the cross dock design. Restrictions on either the personnel capability or the design of the cross dock, or both, severely reduces the effectiveness of the cross dock. • The previous research on the sequence of allocation of trucks to specific doors within the cross dock can be enhanced with a new sequencing method. The new method allocates the transport, in sequence of arrival, to the open door that either numrruses the walk distance in the facility; or maximises the completion of the consignments in order to minimise the area required to build the consignments; or a combination of both. The choice of these will be determined by the constraints imposed by the design of the building. This is an important extension as this ties the supply chain into the cross dock operation, rather than looking at the cross dock in isolation as has been done in this previous research. • The factors that influence the design of a cross dock as to its size, shape, number of doors, and the specifically required additional areas, is defined in detail. The principles of these factors and their inter-relationships and dependencies are used in a detailed design for a cross dock. The detailed design process is set out from data analysis through to the actual size calculations and layouts. Measurements of walk distance and sort movement are used to determine the most effective design. The design is shown to be considerably more effective than the older designs. This work has significantly extended the research on the design principles and success factors for implementation of cross docks in retail supply chains. The research derives a unique new classification for cross docks. An improvement is made to existing research on the allocation of the transport to particular doors in the cross dock. The operation, management and personnel are shown to require specific characteristics. The information systems required for effective cross docks is determined and defined. The identification of the individual items by barcode and the information required within the barcode depending on the information sophistication of the service providers in the supply chain is defined. A detail process to design a cross dock is evolved, with the full knowledge of the factors that must be considered and their interrelationships. Measurements to determine the effectiveness of the design are used to choose the most appropriate design. All these are then synthesised into a new design, which is far more effective than any of the other designs researched. The design process will produce a very effective cross dock as has been demonstrated with a new facility.
AFRIKAANSE OPSOMMING: geen opsomming
Bradley, Alexandre. "A comparison of whole life cycle costs of robotic, semi-automated, and manual build airport baggage handling systems." Thesis, Cranfield University, 2013. http://dspace.lib.cranfield.ac.uk/handle/1826/9311.
Повний текст джерелаHeinig, Andreas [Verfasser], Peter [Akademischer Betreuer] Marwedel, and Hermann [Gutachter] Härtig. "Flexible error handling for embedded real time systems : Operating system and run time aspects / Andreas Heinig. Betreuer: Peter Marwedel. Gutachter: Hermann Härtig." Dortmund : Universitätsbibliothek Dortmund, 2015. http://d-nb.info/1108290477/34.
Повний текст джерелаHenriksen, Dag. "Operation Allied Force : a product of military theory or political pragmatism? : an examination of the role of air power in handling the Kosovo crisis, 1998-99." Thesis, University of Glasgow, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.439094.
Повний текст джерелаBantel, Carlos Adolfo [UNESP]. "Análise de extração de madeira de eucalipto com forwarder em floresta de primeira e segunda rotação." Universidade Estadual Paulista (UNESP), 2006. http://hdl.handle.net/11449/90570.
Повний текст джерелаUniversidade Estadual Paulista (UNESP)
Foram avaliados três subsistemas de extração de madeira em floresta de Eucalyptus spp, de um sistema colheita florestal de madeira curta, com toretes de 6 metros de comprimento. Subsistema 1: floresta de primeira rotação com pilhas de madeira formadas sobre travesseiros e dispostas em ambos os lados do ramal de extração; Subsistema 2: floresta de primeira rotação com pilhas de madeira formadas sobre travesseiros e dispostas em uma só fileira de pilhas de madeira por ramal de extração; Subsistema 3: floresta de segunda rotação, com as pilhas de madeira dispostas diretamente sobre o solo, ou seja, sem o travesseiro, em ambos os lados do ramal de extração. As pilhas de toretes foram extraídas utilizando a máquina forwarder Valmet 890.2. Os tempos de carregamento, descarregamento, deslocamento sem carga, deslocamento com carga e o tempo total do ciclo de extração da madeira foram menores no subsistema 2. O subsistema 2 apresentou maior rendimento operacional e maior economia no consumo de óleo Diesel por metro cúbico de madeira extraída em comparação com os demais subsistemas. O aumento do tamanho das pilhas e a concentração da madeira em uma única fileira de pilhas por ramal resultaram em maior rendimento operacional na extração com o forwarder.
Three forest handling and harvesting subsystems in an area of Eucalyptus spp. were analysed, in a cut-to-length system with short wood logs of 6 meters length. Subsystem 1: first rotation forest with wood logs piling up formed over platform and disposed along both sides of the extraction branches; Subsystem 2: first rotation forest with wood logs piling up formed over platform and disposed only along one side of the extraction branches; Subsystem 3: second rotation forest, with wood logs disposed directly on the floor, without any platform, along both sides of the extraction branches. The short wood log piles were extracted using a Valmet 890.2 forwarder. Times of loading and unloading activities, loaded and unloaded movements and total extraction time were smaller on subsystem 2. The subsystem 2 also permitted upper operational yield and bigger savings on Diesel oil consumption per cubic meter of extracted wood when compared to the other subsystems. The adoption of bigger wood piles concentrated along only one side of the extraction branch also resulted in an increasing on operational yield with the forwarder.
Hansson, Tengberg Henrik, and Andreas Adlerborn. "Design of an Assembly System at AERCRETE INDUSTRIES." Thesis, Jönköping University, Jönköping University, JTH, Industrial Engineering and Management, 2009. http://urn.kb.se/resolve?urn=urn:nbn:se:hj:diva-10742.
Повний текст джерелаThe forming of an assembly system is a complex task, which should be considered as never ending. In order to successfully plan and implement an assembly system it is of vital importance that the obstacles and preconditions that have an impact on the system are identified and evaluated. This together with the necessary support activities and the attributes of the product to be assembled constitutes the starting point for the forming of the assembly system.
The aim of this thesis is to link the theoretical findings with the issues stated above, and through this explain a best practice approach when forming the assembly system. The theoretical work aims at describing the nature and activities within assembly and manufacturing systems and explains these in three different levels of strategies divided into Manufacturing strategies, Layout, material flow and design strategies and finally Logistic, material handling and quality strategies. Then the obstacles and preconditions found are discussed and evaluated which set the basis for the forming of the assembly system and by linking these with the relevant theory, conceptual design proposals for the assembly system and the Logistic support system are formed.
These are then evaluated and finally a proposal for the detailed layout of the assembly system is given. This proposal is then to be used as a guideline for the company Aercrete when forming their assembly system.
Johnsson, Frida. "The Interface Between Social Entrepreneurship and Governance : A qualitative case study including eight social entrepreneurs operating within regions of India." Thesis, Karlstads universitet, Fakulteten för samhälls- och livsvetenskaper, 2012. http://urn.kb.se/resolve?urn=urn:nbn:se:kau:diva-15772.
Повний текст джерелаMargono, Buntoro Sandhy. "Optimierung von Bewegungsabläufen mit schwingungsfreien Endpositionen zur Verkürzung der Arbeitszyklen von Container-Schnellumschlag-Anlagen / Optimization of Vibration-free Positioning for Reducing the Operating Cycles of Container Handling Cranes." Gerhard-Mercator-Universitaet Duisburg, 2004. http://www.ub.uni-duisburg.de/ETD-db/theses/available/duett-10262004-094516/.
Повний текст джерелаBantel, Carlos Adolfo 1945. "Análise de extração de madeira de eucalipto com forwarder em floresta de primeira e segunda rotação /." Botucatu, [s.n.], 2006. http://hdl.handle.net/11449/90570.
Повний текст джерелаAbstract: Three forest handling and harvesting subsystems in an area of Eucalyptus spp. were analysed, in a cut-to-length system with short wood logs of 6 meters length. Subsystem 1: first rotation forest with wood logs piling up formed over platform and disposed along both sides of the extraction branches; Subsystem 2: first rotation forest with wood logs piling up formed over platform and disposed only along one side of the extraction branches; Subsystem 3: second rotation forest, with wood logs disposed directly on the floor, without any platform, along both sides of the extraction branches. The short wood log piles were extracted using a Valmet 890.2 forwarder. Times of loading and unloading activities, loaded and unloaded movements and total extraction time were smaller on subsystem 2. The subsystem 2 also permitted upper operational yield and bigger savings on Diesel oil consumption per cubic meter of extracted wood when compared to the other subsystems. The adoption of bigger wood piles concentrated along only one side of the extraction branch also resulted in an increasing on operational yield with the forwarder.
Orientador: Paulo Torres Fenner
Coorientador: Elias Taylor Durgante Severo
Banca: Kleber Pereira Lanças
Banca: Jair Rosas da Silva
Mestre
Lindroos, Ola. "Efficiency and safety in self-employed family forestry /." Umeå : Dept. of Forest Resource Management and Geomatics, Swedish University of Agricultural Sciences, 2006. http://epsilon.slu.se/2006110.pdf.
Повний текст джерелаCoelho, Robson Jacinto. "Modelo de simulação operacional do manuseio de matérias-primas de uma usina siderúrgica integrada." Universidade Federal da Paraíba, 2011. http://tede.biblioteca.ufpb.br:8080/handle/tede/5196.
Повний текст джерелаCoordenação de Aperfeiçoamento de Pessoal de Nível Superior
The main goal of this dissertation is to design and implementation of an Operational Simulation Model (OSM) of the handling of raw material in an Integrated Steelmaking Plant, considering operations of receiving, unloading, stocking, handling and supplying the different raw materials related to the production process with an operational perspective. The aim of this focus is to help in the decision making of the team controlling the ore inventory. The construction of this computer model was based on the methodological framework developed by Coelho, which passed through problem formulation, planning and elaboration of a detailed specification of the model. The OSM showed that most of the valid concepts for simulations with a strategic focus do not present relevance from an operational point of view. The advantage of the OSM is the fact that it is not random or stochastic, but deterministic. The methodology allowed the model elaboration with a minimum effort and great consistency. The results of scenarios with scheduled equipment stops have shown the simulator s flexibility, with previous identification of bottlenecks and allowed the decision making of corrective actions for avoid them on real situations. The filling of the stockyard map using results of consistent scenarios was a great advance in order to automate this activity. The correct behaviour of the simulator allowed the raw material yard team to consider the well succeeded study.
O objetivo principal desta dissertação é construir um modelo de simulação operacional do manuseio de matérias-primas de uma usina siderúrgica integrada, contemplando as operações de recebimento, descarga, estocagem, manuseio e abastecimento das diversas matérias-primas pertinentes ao processo produtivo, com foco operacional, visando auxiliar a tomada de decisões operacionais da equipe que controla o pátio. A construção desse modelo computacional se baseou na estrutura metodológica desenvolvida por Coelho, que passou pela formulação do problema, planejamento do estudo e pela elaboração de uma especificação detalhada do modelo. O modelo de simulação operacional revelou que grande parte dos conceitos válidos para simulações com foco estratégico não representa tanta relevância sob o ponto de vista operacional. Mas a vantagem do modelo de simulação operacional é a ausência de aleatoriedade, não é estocástico, mas sim determinístico. A metodologia inédita, utilizada para desenvolvimento do modelo do pátio de matérias-primas, permitiu a elaboração do modelo com o mínimo de retrabalho e com grande consistência. Os resultados dos cenários, com paradas programadas dos equipamentos, mostraram a flexibilidade do simulador, permitindo a identificação prévia de gargalos e possibilitando a tomada de ações corretivas para evitá-los nas situações reais. O preenchimento do mapa do pátio, a partir de resultados de cenários consistentes, foi um grande avanço, no sentido de automatizar esta atividade. O comportamento correto do simulador permitiu que a equipe do pátio de matérias-primas considerasse o estudo muito bem sucedido.
Reis, Neuto Gonçalves dos. "Viabilidade de operação do duplo semi-reboque de cinco eixos no Brasil." Universidade de São Paulo, 1996. http://www.teses.usp.br/teses/disponiveis/18/18137/tde-13042018-150847/.
Повний текст джерелаThis paper investigates the feasibility of introducing the American twin trailer truck in the Brazilian road transport network. The twin is a five axle configuration with one tractor and two semi-trailers, coupled by an intermediate dolly. The investigation embraces not only economic questions (operational costs), but also operational aspects (freight density and volume, vehicle choice, line extension etc), technological questions (vehicles, trailers and dollies), weights and dimensions legislation, safety impacts (handling and stability, impact of traffic operations and statistic studies of accident rates) and the twin\'s interface with the highway facilities. The American and Canadian studies about twins are reviewed. The paper presents the technical characteristics of twins, the american weights and dimensions legislation and shows how the claim for more productivity in the transport industry and the low density freight growth have induced the use of longer combinations. The study compiles the main results presented in the literature about handling, stability and the twin trailer impact on the highway traffic and analyzes statistics comparing doubles with semi-trailer accident rates. The literature review leads to the conclusion that, althrough the twins could degrade slightly the vehicle traffic safety performance and accelerate the pavement wear, this degradation is overwhelmed by the reduction of the number of vehicles on the roads and direct and indirect transportation costs. The introduction of the win trailer truck in Brazil could be advantageous in order to replace tandem trucks on low demand routes. The savings in terminal times and the higher capacitiy of this configuration would cut costs as compared to the straight truck, semi-trailer and truck-and-trailer configurations, without relevant deterioration of the operational safety. The results of a large sample with brazilian LTL companies show that almost 50% of them operate with a freight density that would be ideal for twins. The twin\'s introduction, however, faces strong legal impediments in some markets, and only would be feasible if deep changes in the Brazilian weight and dimension regulations would be undertaken.