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Ferzli, Khalil Y. Carleton University Dissertation Engineering Civil and Environmental. "A Comprehensive integrated modelling framework for the optimization of transit operator workforce planning and management." Ottawa, 1992.
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Zhong, Yueru. "Evaluation et gestion de la flexibilité dans les chaînes logistiques : nouveau cadre général et applications." Thesis, Châtenay-Malabry, Ecole centrale de Paris, 2015. http://www.theses.fr/2015ECAP0012/document.
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Cette thèse étudie la problématique de la flexibilité dans les chaînes logistiques. La recherche académique a commencé à s’intéresser à cette problématique depuis quelques années, mais les études existantes restent pour la plupart au niveau conceptuel et il y a peu de consensus sur la définition même de la flexibilité. Cette thèse a pour ambition de définir un nouveau cadre pour la flexibilité dans les chaînes logistiques, proposer des mesures quantitatives pour la flexibilité et enfin optimiser l’utilisation de la flexibilité, en particulier dans un contexte de planification intégrée de la production et du transport.Ce travail de thèse vise tout d’abord à établir un nouveau cadre pour la flexibilité de la chaîne logistique, où les différents aspects de la flexibilité sont classifiés en trois catégories principales: flexibilité de la production, flexibilité de la chaîne logistique et flexibilité du système. Dans chacune de ces catégories, on peut trouver des dimensions primordiales et des dimensions moins importantes.Afin d’évaluer la flexibilité de manière quantitative, nous faisons appel à la méthode Analogie Mécanique. Cette méthode propose une analogie entre un système mécanique vibratoire et une chaîne logistique. Dans ce contexte, nous avons développé une étude de cas pour Louis Vuitton afin d’évaluer la flexibilité de leurs magasins, et nous avons établi une procédure pour implémenter cette méthode.Une autre problématique importante est l’utilisation optimale de la flexibilité existante.Nous nous sommes particulièrement intéressés à la planification intégrée de la production et du transport avec des flexibilités sur la capacité de transport, où la production et le transport sont intimement liés du fait du manque de capacité de stockage et doivent être planifiées conjointement. Particulièrement, les véhicules hétérogènes sont pris en compte.Nous avons construit deux modèles de programmation linéaire en nombres mixtes et développé trois algorithmes qui ont été comparées par rapport à la relaxation linéaire pour les instances de grande taille et aux solutions optimales pour des instances de petite taille. Ces comparaisons montrent que les heuristiques proposées sont efficaces pour résoudre des problèmes réels, aussi bien en termes de qualité de solution qu’en termes de temps de calculThis thesis focuses on flexibility issues in supply chain. These issues are becoming more and more important for firms because of the increasingly changing business environment and customer behaviors. Although some of these issues have been tackled in academic research in recent years, but studies have mainly concentrated in conceptual levels and there is little consensus even on the definition of flexibility. This thesis aims at defining a new framework for the supply chain flexibility, proposing quantitative measures of the flexibility and optimizing the use of flexibility, especially in an integrated production and transportation planning context. The new framework of supply chain flexibility is based on classification of different flexibility aspects in a supply chain into three main categories - manufacturing flexibility,logistic chain flexibility and system flexibility. These flexibility types are further distinguished into major flexibility dimension and other flexibility dimension.In order to measure supply chain flexibility from a quantitative point of view, Mechanical Analogy method is particularly discussed. A procedure is established to enlarge and carry out this method in supply chain, provided with a case study to evaluate the flexibility of Louis Vuitton stores.One of the most important issues is to optimally make use of the available flexibility. We investigate an Integrated Production and Transportation Planning problem with given flexibility tolerances, where the production and transportation activities are intimately linked to each other and must be scheduled in a synchronized way. Particularly, heterogeneous vehicles are taken into account. Two mixed integer linear programming models are constructed.Three algorithms are developed and compared with linear relaxation bounds for large sized real life instances and with optimal solutions for small sized instances. These comparisons show the effectiveness of our heuristics in solving real life problems
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Benhizia, Faten. "OPTIMISATION DU PLAN DE TRANSPORT PAR PLANIFICATION INTEGREE DES RESSOURCES." Thesis, Saint-Etienne, EMSE, 2012. http://www.theses.fr/2012EMSE0668/document.
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La production des circulations ferroviaires a la sncf repose actuellement sur un processus essentiellement sequentiel dans lequel la conception des grilles horaires de circulation (reservation de l'infrastructure pour la circulation des trains de l'offre de transport de la sncf) conditionne largement la conception des planifications des engins ferroviaires (les roulements engins), puis celle des agents de conduite (adc) (les grilles de service des adc). cette strategie de planification sequentielle des ressources ferroviaires a ete massivement adoptee pour des raisons pratiques et scientifiques (historique, savoir-faire, complexite du systeme ferroviaire, etc.). toutefois, cette strategie de planification sequentielle genere des solutions qui peuvent etre de cout eleve et moins robustes aux aleas, car les decisions prises a une etape donnee peuvent reduire considerablement l'ensemble des solutions realisables aux etapes suivantes. face a ce constat et a la forte interaction entre ces trois ressources heterogenes et tres couteuses, la sncf a souhaite investiguer la praticabilite et les apports d'une demarche d'optimisation du plan de transport par planification integree de ces ressources critiques. dans cette optique, les travaux de these ont porte sur l'etude de faisabilite, le prototypage et la validation d'une demarche de planification integree des ressources permettant d'ameliorer l'efficacite globale du plan de transport, d'accroitre la competitivite de la sncf et d'ameliorer la qualite de ses services. nous avons propose une formalisation du probleme de planification integree engins/adc et des algorithmes performants qui s'appuient sur une approche par relaxation lagrangienne pour resoudre de maniere efficace la problematique etudiee. cette approche repose sur l'exploitation de deux briques logicielles developpees a la sncf pour resoudre chacun des sous-problemes de planification des engins et des adc. les algorithmes ont ete testes experimentalement avec des donnees reelles de la region ter bretagne. differentes evolutions des modeles et des algorithmes ont ete etudiees pour rendre ces derniers plus efficaces. les tests de validation sur des jeux de donnees reelles a une echelle industrielle sont encourageants et montrent des gains potentiels allant jusqu'a 4% des adc exploites par rapport a une approche traditionnelle (sequentielle)The planning of railway production at the french national railways (sncf) is currently based on a mainly sequential process in which the design of railway timetabling widely conditioning design planning of railway equipment (rolling stock), then one of the train drivers (driver rosters). this strategy of sequential planning of railway resources massively adopted for practical and scientific reasons (expertise, complexity of the railway system, etc.). however, this strategy generates solutions which can be more expensive and less robust to uncertainties, because decisions taken at any given stage can significantly reduce the overall feasible solutions of the following steps.given this situation and the strong interaction between these heterogeneous and very expensive resources, the thesis deals with the feasibility and inputs of a process where these critical resources could be planned and optimized in an integrated way. the thesis focuses on the feasibility study, prototyping and validation of an integrated approach for planning rolling stocks and drivers, so as to improve the efficiency of the overall transportation plan, increase sncf competitiveness and enhance the quality of its services. we propose a mixed integer linear programming formulation of the rolling stock/ train drivers integrated planning problem. in this mathematical model, each planning sub-problem is formalized and coupling constraints are further introduced to model the interdependencies of these two resources when they are simultaneously used for train production. in this heuristic, the solution of the lagrangian dual and the calculation of feasible solutions are performed by calling two proprietary software modules available at sncf for planning rolling stocks and train drivers. the heuristic is tested experimentally with real data from the ter bretagne region, and several evolutions are introduced in the models and algorithms so as to improve their performances.validation tests on of real data sets at an industrial scale are encouraging and, when compared to a traditional (sequential) approach, show gain of up to 4% for train drivers used
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Yanik, Hatice Deniz. "Integrated Procurement And Transportation Planning For Purchased Components: A Case Study." Master's thesis, METU, 2008. http://etd.lib.metu.edu.tr/upload/3/12609572/index.pdf.
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This study is about an integrated procurement and transportation planning system for purchased components of a consumer-durables manufacturer. Due to transportation cost structures and demand characteristics our problem can be classified as a variant of the dynamic-demand joint
replenishment problem. The problem is to determine the replenishment policy using the advantages of coordinated transportation of items that will minimize the sum of total inventory holding and tranportation costs over a finite planning horizon. A mathematical model is formulated for purchasing and transportation decisions for the purchased items using the advantage of joint transportation costs. A two-phased solution method is proposed in order to obtain a &ldquogood solution&rdquo
for the problem. The proposed solution method is compared with the current practice for different problem instances using retrospective data and created data. As a result it is shown that proposed method decrease the total inventory and transportation cost of the system even though the first aggregate problem can not be solved to optimality.
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Cardoso, Felipe Saluti. "Reestruturação e reprodução da metrópole: as políticas metropolitanas de transporte como determinação da produção do espaço." Universidade de São Paulo, 2016. http://www.teses.usp.br/teses/disponiveis/8/8136/tde-08032017-135118/.
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O presente trabalho trata do processo contemporâneo de reprodução do espaço urbano que inclui a construção de linhas de transporte de alta e média capacidade e envolve intervenções urbanas cujas estratégias articulam a atuação do Estado, de diferentes ramos do capital e de instituições internacionais. Tal processo foi apreendido a partir da análise, por um lado, da construção do primeiro trecho da Linha 15-Prata da Cia do Metrô de São Paulo que transformou a dinâmica socioespacial do bairro de Vila Prudente e, por outro, da investigação dos planos de transportes urbanos do Governo do Estado de São Paulo e de sua Secretaria de Transportes Metropolitanos que, ao longo das últimas duas décadas, sujeitaram-se aos projetos de instituições internacionais, como o Banco Mundial. Tais instituições impõe formas específicas de planejamento ou de uma governança metropolitana para promover intervenções e requalificações urbanas que acompanham o ritmo das reestruturações técnico-produtivas do capital e, no caso de São Paulo, tentam manter a hegemonia da maior metrópole brasileira na divisão territorial do trabalho (como centro de gestão e comando). Resulta dessa estratégia e prática a reinserção de antigos terrenos industriais, vazios urbanos e centralidades espaciais constituídas historicamente no tecido metropolitano e tidos, hoje, como obsoletos, na dinâmica dos mercados imobiliário e financeiro através da construção de infraestrutura. Isso revela que a produção contemporânea do espaço, subordinado à um urbanismo metropolitano e de mercado, objetiva-se, também, na construção de infraestrutura de transportes, reafirmando as relações sociais de produção e suas contradições que vão da superexploração do trabalho e da segregação socioespacial à obsolescência precoce do espaço para atender aos processos de valorização do capital.The present work is related to the contemporary process of reproduction of the urban space, which includes the construction of high and medium capacity transport lines and involves urban interventions, whose strategies articulate the actions of the State, from different branches of the financing and international institutions. Such process was apprehended from the analyses, in one hand. by the construction of the first patch of the Line 15-Silver by the São Paulo Metropolitan Company, which has transformed the social-spacial dynamics of Vila Prudente District. In the other hand, from the investigation of urban transportation plans by the São Paulo state government and its Metropolitan Transport Secretary, that along the last two decades, subjected themselves to the project of International institutions, such as The World Bank, specific ways of planning or a Metropolitan Governancy to promote urban interventions and requalifications, follow the speed of technical-productives restructuring of capital investments in a peripheral country and keep the hegemony of the greatest Brazilian metropolis in the territorial sharing of work as a center of command and management. As result of this strategy and practice we see the reintegration of ancient industrial lots, urban empties and central spaces formed historically in the metropolitan tissues and considered nowadays as obsoletes in the analyses of Finanacial and Real Estate markets, through the construction of infrastructure. This shows up that the space contemporary production, dependent of a metropolitan and Market urbanism, has also as an objective, the building of a transportation infrastructure, assuring the social relationships of production and its contradictions that starts in the superexploitation of work force and socialspacial segregation to the precocious obsolescence of the urban space to favor the capital improvement process.
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Pereira, Alvaro E. (Alvaro Emanuel). "Implications for transportation planning of changing production and distribution processes." Thesis, Massachusetts Institute of Technology, 1997. http://hdl.handle.net/1721.1/69402.
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Leung, Pui-ching Hilda. "Planning for urban sustainability : promoting integrated transit-oriented development /." View the Table of Contents & Abstract, 2005. http://sunzi.lib.hku.hk/hkuto/record/B35081211.
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Chen, Yongjiang. "An integrated process planning and production scheduling framework for mass customization /." View Abstract or Full-Text, 2003. http://library.ust.hk/cgi/db/thesis.pl?IEEM%202003%20CHENY.
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Thesis (Ph. D.)--Hong Kong University of Science and Technology, 2003.Includes bibliographical references (leaves 146-154). Also available in electronic version. Access restricted to campus users.
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Zhang, Luping, and 张路平. "Solving integrated process planning and scheduling problems with metaheuristics." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2014. http://hdl.handle.net/10722/208626.
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Process planning and scheduling are two important manufacturing planning functions which are closely related to each other. Usually, process planning and scheduling have to be performed sequentially, whereby the process plans are the input for scheduling. Many investigations have shown that the separate conduction of the two functions is much likely to ruin the effectiveness and feasibility of the process plans and schedules, and it is also difficult to cater for the occurrence of uncertainties in the dynamic manufacturing environment. The purpose of integrated process planning and scheduling (IPPS) is to perform the two functions concurrently. IPPS is a typical combinatorial optimization problem which belongs to the category of NP-hard problems. Research on IPPS has intensified in recent years. Researchers have reported various IPPS systems and solution approaches which are able to generate good solutions for specific IPPS problems. However, there is in general an absence of theoretical models for the IPPS problem representation, and research on the theoretical aspects of the IPPS is limited.
The objective of this research is to establish a metaheuristic-based solution approach for the IPPS problem in flexible jobshop type of manufacturing systems. To begin with, a graph-based modeling approach for formulating the IPPS problem domain is proposed. This approach defines a way to use a category of AND/OR graphs to construct IPPS models. The graph-based IPPS model can be formulated using mathematical programming tools including polynomial mixed integer programming (PMIP) and mixed integer linear programming (MILP). The analytical mathematical programming approaches can be used to solve simple IPPS instances but they are not capable for large-scale IPPS problems. This research proposes a new IPPS modelling approach to incorporate metaheuristics in the solution strategy. Actually, the solution strategy comprises the metaheuristics and a mapping function. The metaheuristic is responsible for generating the operation sequences; a mapping function is then used to assign the operations to appropriate time slots on a schedule.
General studies of applying constructive and improvement metaheuristics to solve the IPPS problem are conducted in this research. The ant colony optimization (ACO) is applied as a representative constructive metaheuristic, and a nonstandard genetic algorithm approach object-coding genetic algorithm (OCGA) is implemented as an improvement metaheuristic. The OCGA contains dedicated genetic operations to support the object-based genetic representation, and three particular mechanisms for population evolution.
The metaheuristic-based solution approaches are implemented in a multi-agent system (MAS) platform. The hybrid MAS and metaheuristics based IPPS solution methodology is able to carry out dynamic rescheduling to cope with occurrence of uncertainties in practical manufacturing environments. Experiments have been carried out to test the IPPS solution approach proposed in this thesis. It is shown that both metaheuristics, ACO and OCGA, are having good performance in terms of solution quality and computational efficiency. In particular, due to the special genetic operations and population evolutionary mechanisms, the OCGA shows great advantages in experiments on benchmark problems. Finally, it is shown that the hybrid approach of MSA and metaheuristics is able to support real-time rescheduling in dynamic manufacturing systems.published_or_final_version
Industrial and Manufacturing Systems Engineering
Doctoral
Doctor of Philosophy
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Ho, Johnny C. "An integrated MRP and JIT production planning and scheduling system." Diss., Georgia Institute of Technology, 1991. http://hdl.handle.net/1853/30062.
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Palmer, Gareth John. "An integrated approach to manufacturing planning : optimisation in process planning and job shop scheduling." Thesis, University of Huddersfield, 1994. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.241154.
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Within manufacturing, increasing interest in being placed in the possibilities of integrated process planning and scheduling. Separating these two related tasks can impose constraints, on the final schedule, which are both undesirable and unnecessary. These constraints arise from premature decisions regarding the allocation of manufacturing resources. By making use of flexible process plans, these decisions can be delayed until the most appropriate time: during scheduling. The decisions can then be made on the basis of objectives common to both tasks (such as the minimisation of manufacturing cost). This thesis outlines an approach to manufacturing planning which is based on a highly general formulation of the problem. This integrated process planning/scheduling problem can be viewed as a generalisation of process plan optimisation, a task which is also considered in detail. A novel approach to plan optimisation is proposed, which in turn forms the basis for integrated planning and scheduling. Some research into integrated planning/scheduling has been reported in the literature. However, researchers differ in the way they formulate the integrated task. This thesis therefore attempts to outline a general framework for the characterisation of integrated process planning and scheduling problems. This considers both the degree and representation of process plan flexibility, and also the level of detail at which the shop floor is modelled. This framework forms a basis for a comparison of solution approaches. Published solution approaches are mostly based on the use of dispatching rules, but attempts have been made to use optimal search. The use of dispatching rules is essentially an ad hoc approach and, although relatively easy to apply in practice, produces solutions of mediocre quality. However, new research using simulated annealing suggests that neighbourhood search may offer a valuable alternative. This observation is supported by ambitious research published on the use of genetic algorithms. Because of the extreme combinatorial complexity of the combined task, optimal search methods are unlikely to be usable in practice. Furthermore, such methods exhibit a severe lack of generality because they make highly specific assumptions about problem formulation. Neighbourhood search techniques have inherent properties which give them a much higher level of generality. Although it is not an optimal search method, simulated annealing has been shown to provide solutions of significantly higher quality than those achieved by dispatching rule techniques. Also, and unlike optimal search techniques, it appears able to handle the immense complexity of the integrated planning/scheduling task. For the above reasons, it is argued that neighbourhood search techniques, such as simulated annealing, provide the best compromise available between solution quality and practical applicability.
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Ogweno, Donald C. Oyugi. "Integrated optimization of operational and tactical planning for log production." Thesis, University of Canterbury. Forestry, 1995. http://hdl.handle.net/10092/7206.
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Log merchandising, which involves scheduling of stand harvests, planning stem conversion strategies, and market planning for logs, are some of most important decisions made in the management of a resource. Much research attention has focused on developing modelling methodologies for components of log merchandising decision making. However, many planning approaches either do not have the capability to solve these decisions in an integrated manner, or are suitable for making integrated decisions, but only for single time period. Non integrated and single period models cannot be used for evaluating trade-offs between timing of stand harvest and stem conversion strategies in a flexible manner. As a Consequence, such systems can fail to identify merchandising strategies which offer the greatest opportunity benefits.
There are two separate considerations in the integration of such plans. The first is the integration of planning across all temporal levels of decision making, while the other is integration of log production planning for all the stands in a forest estate. In this study, a planning framework was adopted which enables the log merchandising decisions to be solved in an integrated manner. The adopted modelling framework comprises three hierarchical levels: a medium term tactical model, a short term tactical model, and an operational scheduling model.
The medium term tactical model is similar to the many harvest scheduling models in forestry literature, and addresses issues of sustainability of production, regulatory requirements, and preliminary scheduling of log production over a medium term horizon. The short term tactical model dissaggregates the medium term plan into detailed production plans, with stands, group of logging settings, or logging settings as the production units. The model also addresses issues of harvesting system availability, and the optimal location of landings. This model was not developed in the study, but a modelling approach recommended for solving this level is a mixed integer model based on facility location theory, interfaced to a Geographical Information System (GIS) for generating feasible logging layouts and for presentation of reports.
The operational allocation model solves for optimal scheduling of harvesting systems to production units (settings), and also develops detailed log mix production and allocation plans. The problem is formulated as a mixed integer model, with the integer variables representing possible crew allocations, and is solved with commercial mathematical programming packages. The models are integrated with the hierarchical planning paradigm, in which separate models are developed for each decision level with higher level plans forming part of constraints to plans at the lower levels.
A yield description system was developed, which enables the evaluation of log production plans to be conducted in an integrated fashion. The method involves estimating the yield potential of a stand by a few aggregated stem quality classes with a bucking model. The values of the log classes used to specify product preferences in the evaluation, are defined as those which yield maximum volume of a class, without leading to a reduction in the yield of higher quality classes. Planning of outturn from each stand is then determined by dissaggregating the log quality class into market log types with similar quality requirements, the formulation for which is built into optimization models for the various decision levels. In the determination of log mix to be produced, downgrading is employed as a marketing strategy and for balancing demand and supply by log assortments, a capability that is built into the models.
A method was developed for controlling outturn during field implementation. The method involves the iterative revision of log specification variables for each stand, to determine new ones that lead to a satisfactory realization of log production targets. When used in field implementation, the new specifications should result in improved achievement of log production targets, and in reduced variability in the quality of material of each log assortment in a shipment.
The modelling system was demonstrated and tested with an indicative case study. The results demonstrate the major advantages of the integrated planning system, which are the simplicity of model structure, and the feasibility of plans developed at the different planning levels. The yield description and outturn optimization system, when used with the outturn control method, provides plans that are feasible, and which can be used to manipulate the quality of log shipments in an easy and flexible manner. This capability has not been evident in planning approaches reported in the literature.
The integrated log merchandising methodology developed in this study can be easily adapted for use with existing planning systems. There is need for further work on the development of the short term tactical model, in order for the framework to provide fully integrated plans. The method, however, requires further testing and comparison with alternative planning techniques, in order to fully document its potential.
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Madhvarayan, Vishnu. "Integrated Production and Distribution Planning for a Food Processing Company." University of Cincinnati / OhioLINK, 2016. http://rave.ohiolink.edu/etdc/view?acc_num=ucin1459155559.
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Dybing, Alan Gabriel. "Estimation of Increased Traffic on Highways in Montana and North Dakota due to Oil Development and Production." Diss., North Dakota State University, 2012. https://hdl.handle.net/10365/26637.
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Advances in oil extraction technology such as hydraulic fracturing have improved capabilities to extract and produce oil in the Bakken and Three Forks shale formations located in North Dakota, Montana, Manitoba, and Saskatchewan. From 2004 to the present, there has been a significant increase in oil rigs and new oil wells in these areas, resulting in increased impacts to the local, county, state, and federal roadway network. Traditional methods of rural traffic forecasting using an established growth rate are not sufficient under the changing traffic levels. The goal of this research is to develop a traffic model that will improve segment specific traffic forecasts for use in highway design and planning. The traffic model will consist of five main components: 1) a Geographic Information Systems (GIS) network model of local, county, state and federal roads, 2) a truck costing model for use in estimating segment specific user costs, 3) a spatial oil location model to estimate future oil development areas, 4) a series of mathematical programming models to optimize a multi-region oil development area for nine individual input/output movements, and 5) an aggregation of multiple routings to segment specific traffic levels in a GIS network model.
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Yang, Jian. "A priori planning and real-time resources allocation /." Full text (PDF) from UMI/Dissertation Abstracts International, 2000. http://wwwlib.umi.com/cr/utexas/fullcit?p9992941.
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Patel, Niranjani H. "A new approach to solving a multilocation distribution problem." Diss., Georgia Institute of Technology, 1988. http://hdl.handle.net/1853/24550.
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O'Neil, Daniel Arthur. "An integrated decision support system for spectator transportation planning for the 1996 Summer Olympics." Thesis, Georgia Institute of Technology, 1993. http://hdl.handle.net/1853/24540.
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Dimyati, Khoiri Mohd. "Transportation planning in Klang Valley, Malaysia : an integrated approach based on geographical information system." Thesis, University of Newcastle Upon Tyne, 1997. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.387472.
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Holmgren, Johan. "On the integration of optimization and agent technology for transportation and production planning." Doctoral thesis, Karlskrona : Blekinge Institute of Technology, 2010. http://urn.kb.se/resolve?urn=urn:nbn:se:bth-00474.
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This thesis concerns the integration of agent technology and mathematical optimization for improved decision support within the domain of analysis and planning of production and transportation. These two approaches have often been used separately in this domain but the research concerning how to combine them is very limited. The studied domain is considered to be complex due to the fact that many decision makers, which influence each other, often are involved in the decision making process. Moreover, problems in the domain are typically large and combinatorial, which makes them more difficult to solve. We argue that the integration of agent-based approaches and mathematical optimization has a high potential to improve analysis and planning of production and transportation. In order to support this hypothesis, we have developed and analyzed three different approaches to the integration of agent technology and mathematical optimization. First, we present a Multi-Agent-Based Simulation (MABS) model called TAPAS for simulation of decision-making and physical activities in supply chains. By using agent technology and optimization, we were able to simulate the decision-making of the involved actors as well as the interaction between them, which is difficult using traditional simulation techniques. In simulation experiments, TAPAS has been used to study the effects of different types of governmental taxes, and synchronization of timetables. Moreover, we provide an analysis of existing MABS applications with respect to a number of criteria. Also, we present a framework containing a number of abstract roles, responsibilities, and interactions, which can be used to simplify the process of developing MABS models. Second, we present an approach for efficient planning and execution of intermodal transports. The approach provides agent-based support for key tasks, such as, finding the optimal sequence of transport services (potentially provided by different transport operators) for a particular goods transport, and monitoring the execution of transports. We analyzed the requirements of such an approach and described a multi-agent system architecture meeting these requirements. Finally, an optimization model for a real world integrated production, inventory, and routing problem was developed. For solving and analyzing the problem, we developed an agent-based solution method based on the principles of Dantzig-Wolfe decomposition. The purpose was to improve resource utilization and to analyze the potential effects of introducing VMI (Vendor Managed Inventory). In a case study, we conducted simulation experiments, which indicated that an increased number of VMI customers may give a significant reduction of the total cost in the system.
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Satir, Benhur. "A General Production And Financial Planning Model For Integrated Poultry Organizations." Master's thesis, METU, 2003. http://etd.lib.metu.edu.tr/upload/105840/index.pdf.
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For the last two decades, demand for poultry meat has been soared, since it is
healthier and less costly than its substitutes. In order to meet this increasing demand,
integrated poultry organizations have been established all over the world.
Usually, an integrated poultry organization has the divisions of breeder coops,
incubation house, broiler coops, feed mill, slaughterhouse and marketing. This
complex structure makes production planning activities more difficult for integrated
poultry organizations. The aim of this study is to propose a production
and financial planning model for Önder Integrated Poultry Incorporation using mathematical modelling techniques and statistical methods.
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Handal, Dawud Kamal. "Computer-aided design of integrated production planning and inventory control systems." Ohio : Ohio University, 1987. http://www.ohiolink.edu/etd/view.cgi?ohiou1183045287.
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Hasan, Mohammad Babul. "Optimization of Production Planning for a Quota-Based Integrated Commercial Fishery." Thesis, University of Canterbury. Management, 2007. http://hdl.handle.net/10092/873.
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A quota-based integrated commercial fishery owns fishing trawlers, processing plants, and fish quotas. Such a fishery must decide how to schedule trawlers for fishing and landing, how to schedule processing of products, how to schedule labour for processing, and how to plan inventory of raw materials and products. This problem is of great economic significance to New Zealand, whose economy depends to a large extent on the fishery industry. To assist the fishery manager, we develop a mixed integer linear program (MILP) for optimal scheduling of fishing trawlers, production planning (processing) and labour allocation for a quota-based integrated fishery of New Zealand. The model decides when and where each trawler should go for fishing, how much fish each trawler should land, and how much product to produce in each period. Since the fishery is a private farm, its main objective will be profit maximization (or cost minimization if its demand is on contract). The government manages the conservation of fish through the quota allocation. In this thesis the objective of the fishery model is to maximise the total profit. We demonstrate our model with examples based on data from a major New Zealand fishery. We investigate ways to manage the uncertainties involved in trawler scheduling and production planning of the fishery. To manage end-of-planning-horizon effects in the fishery, we develop a simple safety stock approach. We also analyse the workability of a rolling horizon approach to solve the longer planning horizon models and to deal with the end-of-planning horizon effects. We investigate the effect of initial and final position of the trawlers on the profit. We also investigated many different challenging data sets to observe the impact on the effectiveness of our IFPM. The second objective of this thesis is to develop an efficient solution procedure for the MILP, named integrated fishery planning model (IFPM). The IFPM consists of a fishing subproblem, a processing subproblem, and complicating side constraints. We have tried techniques including LP relaxation, Lagrangean relaxation (LR), Dantzig-Wolfe decomposition (DWD) and decomposition-based pricing (DBP). We develop a new DBP method to solve the IFPM. It gives excellent computation times. We also develop a decomposition-based O'Neill pricing (DBONP) method to improve the solution obtained from DBP procedure. It improves the DBP solutions but takes longer time to solve the IFPM. Finally, we develop a simple and efficient reduced cost-based pricing (RCBP) method. It takes less time to solve the IFPM and yields excellent results. The initial formulations for several planning horizons are solved using the AMPL modelling language and CPLEX with branch and bound. Relevant results and computational difficulties are reported.
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MONTEIRO, MARCELO MACIEL. "AN INTEGRATED MODEL FOR LOGISTICS NETWORK DESIGN OF FACILITY LOCATION, PRODUCTION, TRANSPORTATION AND INVENTORY DECISIONS." PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIRO, 2008. http://www.maxwell.vrac.puc-rio.br/Busca_etds.php?strSecao=resultado&nrSeq=26843@1.
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PONTIFÍCIA UNIVERSIDADE CATÓLICA DO RIO DE JANEIROPROGRAMA DE SUPORTE À PÓS-GRADUAÇÃO DE INSTS. DE ENSINO
O trabalho tem como objetivo desenvolver uma formulação matemática para o problema de projeto de redes logísticas que seja integrado e flexível de modo a contemplar escolhas de localização de instalações, transporte, produção e estoques. O projeto de redes considera seleção de fornecedores, plantas e armazéns e de opções de transportes, com alocação de produtos para plantas de manufatura e armazéns, e ainda consideram questões de estocagem na rede logística como custos de manutenção e de obtenção de estoques. A formulação resultante é um modelo de programação não linear inteira mista, feita para um único período com a demanda estocástica. Por ser um problema NP-Difícil, para a resolução do problema proposto foi utilizado o algoritmo Outer-Approximation, que foi testando por meio do dimensionamento de três classes distintas.
This thesis aims to develop a mathematical formulation to an integrated and flexible logistics network design that include choices of facility locations, transportation, production and inventories. The network designs consider vendors, plants, warehouses and transportation modes choices. The proposed model considers products assignment to plants and warehouses, inventory holding and procurement costs. The mathematical formulation of the model is a Mixer Integer Non Linear Program (MINLP) problem, referring to a single period with stochastic demand. The problem is NP-Hard and we used the Outer-Approximation algorithmic as the method to resolve the model proposed. We tested the algorithmic for three different instances (scenarios).
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Lee, Chi-on. "Sustainable development and integrated transport planning : "Is Hong Kong moving towards a more sustainable transport system for new development areas?" /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B2104238X.
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Mitwasi, Mousa George 1964. "INTEGRATED FORMULATION FOR THE FACILITIES LAYOUT, PROCESS SELECTION, AND PRODUCTION PLANNING PROBLEMS." Thesis, The University of Arizona, 1987. http://hdl.handle.net/10150/276477.
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In this thesis we present an integrated formulation for production planning, facilities layout and process selection and provide two heuristics for solving the integrated problem. The traditional solution procedures to each of the subproblems are discussed. The decisions modeled in these three problems are interrelated and, in some cases, share overlapping data requirements. The integrated formulation provided is a mixed integer program. Solving this mixed integer program optimally is a hard problem. Thus, in this thesis we only provide heuristic solutions. An optimal branch and bound algorithm is suggested. Both heuristic solutions are demonstrated on a sample problem. The results of testing eight problems is recorded. Further suggestions for improving the heuristic solutions are also provided.
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Yang, Jian. "An asynchronous decision process (ADP) approach for integrated planning in batch-sized manufacturing industry." Thesis, Lancaster University, 1995. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.337468.
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Leung, Pui-ching Hilda, and 梁佩貞. "Planning for urban sustainability: promoting integrated transit-oriented development." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2005. http://hub.hku.hk/bib/B45014140.
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Leung, Chun-wai David. "An agent-based approach for integrating process planning and scheduling." Click to view the E-thesis via HKUTO, 2006. http://sunzi.lib.hku.hk/hkuto/record/B36978541.
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Leung, Chun-wai David, and 梁俊偉. "An agent-based approach for integrating process planning and scheduling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2006. http://hub.hku.hk/bib/B36978541.
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Wan, Sze-yuen, and 溫思源. "Integrated process planning and scheduling with setup time consideration by ant colony optimization." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2012. http://hub.hku.hk/bib/B49618076.
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In recent years, lots of research effort was spent on the integration of process planning and job-shop scheduling. Various integrated process planning and scheduling (IPPS) models and solution approaches have been proposed. The previous and existing research approaches are able to demonstrate the feasibility of implementing IPPS. However, most of them assumed that setup time is negligible or only part of the processing time. For machined parts, the setup for each operation includes workpiece loading and unloading, tool change, etc. For setup that depends only on the operation to be processed (sequence-independent), it is applicable to adopt the assumption of not considering setup in IPPS. For setup that depends on both the operation to be processed and the immediately preceding operation (sequence-dependent), it is an oversimplification to adopt such assumption. In such cases, the setup time varies with the sequence of the operations. The process plans and schedules constructed under such assumption are not realistic or not even feasible. In actual practice, therefore, the setup time should be separated from the process time in performing the IPPS functions. In this thesis, a new approach is proposed for IPPS problems with setup time consideration for machined parts. Inseparable and sequence-dependent setup requirements are added into the IPPS problems. The setup times are separated from the process times and they vary with the sequence of the operations.
IPPS is regarded as NP-hard problem. With the separated consideration of setup times, it becomes even more complicated. An Ant Colony Optimization (ACO) approach is proposed to handle this complicated problem. The system is constructed under a multi-agent system (MAS). AND/OR graph is used to record the set of feasible production procedures and sequences. The ACO algorithm computes results by an autocatalytic process with the objective to minimize the makespan. Software agents called “artificial ants” traverse through the feasible routes in the graph and finally construct a schedule. A setup time parameter is added into the algorithm to influence the ants to select the process with less setup time. The approach is able to construct a feasible solution with less setup time.
Experimental studies have been performed to evaluate the performance of MAS-ACO approach in solving IPPS problems with separated consideration of setup times. The experimental results show that the MAS-ACO approach can effectively handle the problem.published_or_final_version
Industrial and Manufacturing Systems Engineering
Master
Master of Philosophy
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Lewe, Jung-Ho. "An Integrated Decision-Making Framework for Transportation Architectures: Application to Aviation Systems Design." Diss., Available online, Georgia Institute of Technology, 2005, 2005. http://etd.gatech.edu/theses/available/etd-04132005-204114/unrestricted/Jung-Ho%5FLewe%5F200505%5Fphd.pdf.
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Thesis (Ph. D.)--Aerospace Engineering, Georgia Institute of Technology, 2005.Amy R. Pritchett, Committee Member ; Moore, Mark D., Committee Member ; Wilhite, Alan, Committee Member ; Schrage, Daniel P., Committee Chair ; Mavris, Dimitri N., Committee Co-Chair ; DeLaurentis, Daniel A., Committee Member. Vita. Includes bibliographical references.
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Dillon, Jeffrey Elliot. "The design of fixed routes in local area systems." Thesis, Georgia Institute of Technology, 1992. http://hdl.handle.net/1853/25519.
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Wang, Deyun. "Integrated Scheduling of Production and Transportation Operations with Stage-dependent Inventory Costs and Due Dates Considerations." Phd thesis, Université de Technologie de Belfort-Montbeliard, 2012. http://tel.archives-ouvertes.fr/tel-00720660.
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Increasing global competition in the business world and heightened expectations of customers have forced companies to consider not only the pricing or product quality, but reliability and timeliness of the deliveries as well. In manufacturing-centric industries such as automotive and electronics, distribution and inventory costs constitute the second and third largest cost components following the production costs. Therefore, industrial and logistics companies need to continuously search for ways to lower the inventory level and distribution cost. This trend has created a closer interaction between the different stages of a supply chain, and increased the practical usefulness of the integrated models.This thesis considers two categories of integrated scheduling problems. One is Integrated Scheduling of Production-Distribution-Inventory problems (ISPDI problems) and the other is Integrated Scheduling of Production-Inventory-Distribution-Inventory problems (ISPIDI problems). Jobs are first processed on a single machine in the production stage, and then delivered to a pre-specified customer by a capacitated transporter. Each job has a distinct due date, and must be delivered to customer before this due date. Each production batch requires a setup cost and a setup time before the first job of this batch is processed. Each round trip between the factory and customer requires a delivery cost as well as a delivery time. Moreover, it is assumed that a job which is completed before its departure date or delivered to the customer before its due date will incur a corresponding inventory cost. Our objective is to minimize the total cost involving setup, inventory and delivery costs while guaranteeing a certain customer service level.For ISPDI problems, we firstly provide a mixed integer programming model for the case of multi-product, single-stage situation, and develop an improved Genetic algorithm (GA) for solving it. Then, we extend this model to a single-product, multi-stage model, and provide two methods, dominance-related greedy algorithm and GA, for solving it. For ISPIDI problems, we establish a general non-linear model for the case of single-product situation and devise a special case from the general model. Then we provide an optimality property between the production and delivery schedules for the special case. Finally, a heuristic approach is developed for solving it. For each problem under study, in order to evaluate the performance of the proposed algorithms, some interesting lower bounds on the corresponding objective functions are established according to different methods such as Lagrangian relaxation method, classical bin-packing based method. Computational results show the efficiency of the proposed models and algorithms in terms of solution quality and running time.
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Sadeghi, Azadeh. "Global Supply Chain Inventory Management and Production Planning Strategies." Ohio University / OhioLINK, 2017. http://rave.ohiolink.edu/etdc/view?acc_num=ohiou1509528764663001.
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Lim, Ming Kim. "Optimising integrated process planning and production scheduling by using a multi-agent system." Thesis, University of Exeter, 2005. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.407290.
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Viana, Daniela Dietz. "Integrated production planning and control model for engineer-to-order prefabricated building systems." reponame:Biblioteca Digital de Teses e Dissertações da UFRGS, 2015. http://hdl.handle.net/10183/127770.
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A industrialização da construção civil é uma das possíveis estratégias adotadas para melhorar a qualidade e produtividade da produção neste ambiente altamente competitivo. Entretanto para uma melhoria na eficiência da produção, a simples implantação de uma tecnologia industrializada não é o suficiente. Existe a necessidade de melhorar os sistemas de gestão como um todo. O sucesso da implementação de sistemas de planejamento como o Last Planner, desenvolvidos especialmente para a construção civil, instiga o desenvolvimento de estudos em diferentes processos produtivos. Em relação à implementação de princípios da produção enxuta, o sistema é apontado como um ponto de partida para uma empresa atingir uma estabilidade básica. Este estudo foca-se em um tipo específico de sistema de produção industrializadas chamado engineer-to-order (ETO), quando a requisição de produto pelo cliente é realizada na fase de projeto. Neste tipo de sistema construtivo há uma necessidade de integrar a fabricação das peças conforme as necessidades do canteiro de obras. Esta pesquisa visa a desenvolver um modelo integrado de planejamento e controle da produção de sistemas ETO pré-fabricados para construção civil, integrando o projeto, manufatura e montagem em obra. A pesquisa faz parte de uma parceria da Universidade Federal do Rio Grande do Sul com uma empresa de fabricação e montagem de estrutura (Empresa A) metálica interessada em melhorar seus processos de planejamento e controle da produção. O método de pesquisa é baseado na pesquisa construtiva, ou design science, em que há um esforço do pesquisador em produzir um artefato como resultado da pesquisa, que neste caso, é um modelo de planejamento e controle da produção. O processo de implementação de mudanças da empresa adotou a estratégia da pesquisa-ação, de forma que as soluções eram coletivamente acordadas com as pessoas responsáveis pela sua utilização, para garantir que a mesma se efetivasse nos procedimentos da empresa. Neste tipo de estratégia procura-se estabelecer ciclos de aprendizagem ao longo da pesquisa, em que as soluções são continuamente avaliadas e adaptadas para melhoria dos processos em análise. Os resultados da empresa A foram divididos em quatro fases de implementação. Na primeira fase houve um esforço em consolidar uma integração nos planos de curto prazo. Na segunda fase o foco foi no sistema como um todo, promovendo mecanismos para coletar informações sobre o andamento das obras para retroalimentar a fábrica. As barreiras enfrentadas para garantir esta retroalimentação demonstraram a necessidade da utilização de outros métodos. Por isso, a terceira fase se concentrou no desenvolvimento de ferramentas de gestão visual para melhorar os processos analisados nas fases anteriores. A quarta fase do estudo foi baseada no estudo dos processos logísticos da empresa, visto que representam a interface entre fábrica e obra. Terminado o estudo na empresa A dois estudos foram conduzidos no exterior para compreender contextos distintos de sistemas de produção ETO. O primeiro (empresa B) responsável pelo sistema de climatização da edificação. A empresa realiza o projeto, fabricação e instalação dos sistemas de dutos em metal laminado, assim como o maquinário necessário para as trocas de ar. O estudo foi baseado no fornecimento do sistema para uma obra específica. Neste estudo foram desenvolvidas ferramentas de planejamento para facilitar a sincronização entre fabricação e instalação do material em obra. O segundo estudo (empresa C) foi realizado em uma empresa de estrutura metálica que desenvolveu uma conexão inovadora, facilitando seus processos produtivos. Este estudo teve caráter descritivo, analisando como a sua tecnologia facilitou o sistema de planejamento e controle da produção. A partir dos resultados obtidos nos estudos foi possível desenvolver o modelo final de planejamento e controle da produção para sistemas ETO de pré-fabricados. A maioria dos processos propostos neste modelo foi testada na empresa A. Embora a empresa estudada ainda necessite implantar algumas melhorias no seu sistema de planejamento e controle para se adequar ao modelo proposto, as mudanças realizadas trouxeram benefícios na comunicação e sistematização das informações entre os diferentes níveis de planejamento e controle. As contribuições teóricas do trabalho foram um modelo conceitual para compreender a complexidade neste tipo de sistema de produção; a identificação dos principais requisitos para desenvolver sistemas de planejamento e controle da produção para este ambiente; e a adaptação do conceito de WIP utilizando o status dos produtos.The industrialization of construction work is one of the ways it is possible to achieve better quality and productivity in this competitive environment. However, in order to improve efficiency using industrialized technologies is not enough. There is a need to improve planning and control systems. Although the Last Planner System has been developed for the construction environment, since it was devised the successful results promoted its implementation in different production environments. Regarding lean production implementations, the system has been pointed out as a starting point for a company to achieve the basic stability. This study is focused in one type of industrialized production system: the engineer-to-order. By industrialized, it is the prefabrication that has been addressed. In these kinds of production systems, there is a need to integrate the prefabrication plant with the construction site needs. This research project aims to develop an integrated planning and control production planning and control model for ETO prefabricated systems, integrating design, manufacturing and site assembly. The research is part of a partnership with a steel fabricator company (Company A) that was interested in improving its production planning system. The research method is grounded in the design science research, in which there is an effort from the researcher to develop an artefact as an output of the research process, in this case, a planning and control model. The implementation adopted some strategies from the action-research, so some solutions needed to be collectively constructed between the researcher and the practitioners, in order to have an effective use in the organization. Following this strategy, it is possible to have same learning cycles during the implementation of the solutions, which are continually assessed and adapted in order to improve the processes analysed. The results are divided into four phases of implementation. In the first step the main effort was in consolidating an integrated planning and control process for the short-term in the production units. In the second step the focus was the overall system, mainly providing mechanisms to collect the status of all construction sites for the plant. The barriers to improve this feedback process brought to light the need for using visual management tools. This development concerned the third step of implementation, further improving the changes made in the previous phases. The fourth step was based on the analysis of the logistics processes, as the interface between the plant and site assembly. After the main empirical study on Company A, two studies were carried out abroad in order to understand a different context of ETO production systems. The first concerns a mechanical contractor situated in a high complex project. In this study, it was possible to develop some planning tools to facilitate the analysis between the fabrication and site installation of the products. The second concerns a steel fabricator focused on the structural system. This was a descriptive study that analysed the differentiation of the products provided by this company and the impact of it in the planning and control system. Based on the results obtained in the implementation process, the integrated planning and control model for ETO building systems was devised. Most of the processes proposed in the model were assessed in Company A. Although there is still a need to improve the production planning and control system of that company, the implementation enhanced the communication between the operational and tactics level and also promoted a systematic way to collect information for each level of the production planning and control system. The theoretical contributions of the research were the development of a framework to understand the complexity of this kind of production system; the identification of the main requirements for developing a planning and control system for this environment; and the adaptation of the concept of WIP using the status of the product.
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Steffansson, Hlynur. "Methods and algorithms for integrated multi-scale optimisation of production planning and scheduling." Thesis, Imperial College London, 2007. http://hdl.handle.net/10044/1/7437.
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Gupta, Deepak Prakash. "Development of an integrated model for process planning and parameter selection for machining processes." Morgantown, W. Va. : [West Virginia University Libraries], 2007. https://eidr.wvu.edu/etd/documentdata.eTD?documentid=5468.
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Thesis (Ph. D.)--West Virginia University, 2007.Title from document title page. Document formatted into pages; contains v, 91 p. : ill. (some col.). Includes abstract. Includes bibliographical references (p. 53-56).
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Cheung, Kwok-wah. "The role of the railway in urban transport : integrated transport, land use and environmental planning in Hong Kong /." Hong Kong : University of Hong Kong, 2001. http://sunzi.lib.hku.hk:8888/cgi-bin/hkuto%5Ftoc%5Fpdf?B23339056.
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Bishop, Peter (Peter George) Carleton University Dissertation Engineering Electrical. "A Coherent planning model for the development of integrated materials plans and production schedules." Ottawa, 1992.
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Goh, Wan Tsin. "Multi-agent based integrated process planning and production scheduling in an agile manufacturing environment." Thesis, University of Exeter, 2003. http://ethos.bl.uk/OrderDetails.do?uin=uk.bl.ethos.400907.
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Wang, Yiting. "A game theory approach for the collaborative planning of production and transportation activities in the supply chain." Thesis, Bordeaux, 2018. http://www.theses.fr/2018BORD0058/document.
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L’étude de la planification entre partenaires coopérant au sein d’une chaine logistique au niveau tactique fait l’objet de cette thèse. Le présent travail se focalise plus particulièrement sur la coordination des processus de planification des activités de transport et de production, autour d’une nouvelle approche fondée sur la théorie des jeux. Deux situations de coopération sont considérées, selon le caractère homogène ou hétérogène des partenaires ; ainsi une première étude est menée sur un ensemble d’opérateurs de transport pour ensuite être étendue à la relation entre l’entreprise manufacturière et les transporteurs qui travaillent avec elle. L’expérimentation s’appuie sur des modèles mathématiques en programmation linéaire pour simuler les processus de planification des différents groupes de partenaires (également appelés coalitions), un protocole de coopération utilisant certaines propriétés liées à la théorie des jeux et sur une répartition équitable des gains / coûts telle que préconisée par la valeur de Shapley. Les modèles et l’ensemble du protocole sont appliqués à deux cas d’étude basés sur des jeux de données réalistesThis thesis focuses on the collaboration between partners inside supply chain at the tactical level of planning. This work aims to develop a new approach based on game theory to solve the problem of coordinating processes concerned by production and transportation planning decision making. Two types of coalitions cooperative games are implemented according to the nature of partners: the cooperation between homogeneous partners concerns multiple transport operators while the other case is more on the relationships between heterogeneous partners including one manufacturer and multiple transport operators. The coordination is supported by mathematical models implemented in linear programming which simulate the planning process within the various possible pools of partners, also called “coalitions”. These models are used in a gains/costs sharing protocol between the partners which is based on the Shapley value. Some basic properties are checked in order to verify if the cooperation is valid. The models and the protocol are assessed on theoretical test cases based on realistic data sets
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Duff-Riddell, W. R. (Wayne Russell). "A computerised decision support system for the implementation of strategic logistics management optimisation principles in the planning and operation of integrated urban public transport." Thesis, Stellenbosch : Stellenbosch University, 2001. http://hdl.handle.net/10019.1/52067.
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Thesis (PhD)--University of Stellenbosch, 2001.ENGLISH ABSTRACT: Public and private transport system planning and operation have tended to be fragmented functions. In particular, public transport is often planned and operated independently of the "private" transport system. South African government policy now requires that comprehensive, strategic transport plans be prepared by metropolitan transport authorities. These plans are expected to conform to national strategic objectives as well as including local current and longterm objectives. This planning is required in the environment of a multi-modal, multi-operator, public-private partnership scenario that is new for most of the role players. The lack of experience is accompanied by a lack of any existing model for dealing with this scenario. This dissertation describes such a model. The model is based on the principles of strategic logistics management commonly employed in commerce and industry, including service-oriented industries. The modelling process is thus based on achieving a combination of customer service and long-term objectives. The model comprises a number of separate components and steps: • A transport network model (Emme/2). ~ A multi-class, generalised-cost assignment of private and public transport demand onto a network, modified to be modeless to the public transport users, is performed. This assignment allows for the imposition of generalised-cost reflecting urban-planning objectives in addition to more conventional costs such as travel cost. In this assignment, the interaction of public and private transport is accounted for and results in an associated modal choice. ~ A series of single-class generalised-cost assignments is then used to "focus" public transport demand to create corridors of demand adequate to justify public transport routes. This process can be enhanced to develop a design promoting switching from private to public transport. It also allows for multi-period route design. ~ The results of this modelling process are output to a text file and then subject to the processes described below. The results of these processes are then input into the network model where a standard transit assignment is performed and used to modify the proposed lines and update the network design data with respect to boardings and alightings at nodes. This information is used to design fixed infrastructure. • A Microsoft Access database and route extraction program. );> The network model data is drawn into the database where it is subject to a route extraction program that converts the assignment results from the network model into a set of mode specific potential public transport route definitions. These route definitions are based on paths of maximum demand. The extraction process is controlled by parameters specified by the planner, such as minimum route lengths and the demand level for various categories of service. );> After route extraction, vehicle allocation, and transit assignment, the database provides details of the boardings and alightings and number and details of transit lines using each node and link in the network. This data is used to design fixed infrastructure. • A Microsoft Excel spreadsheet vehicle operating cost model. );> For each vehicle type, the operating cost given the anticipated vehicle mileage and operating speed is determined. This is used to guide the choice of vehicles for different routes. • A Lingo goal-programming model. );> The potential routes and the available or potential fleet are subjected to a goalprogramme in which the optimum choice of vehicle allocation is determined. The allocation parameters can be controlled by the planner. These parameters may include costs, energy, fuel consumption, and vehicle and route limitations amongst others. Multiperiod design is included in the modelling process so that the optimum design may be for the operating period, daily, or weekly cycle. The modelling process provides two main outputs: • A set of fully described and costed transit lines ill terms of both routing and vehicle allocation. These transit line definitions can be output to the level of driver instructions if necessary. • Details of the type and location of infrastructure to be provided on the network.
AFRIKAANSE OPSOMMING: Openbare en private vervoerstelsel-beplanning en -bedryf IS geneig om gefragmenteerde funksies te wees. Dit is veral waarneembaar in die openbare vervoerstelsels waarvan die beplanning en bedryf onafhanklik van die "private" vervoerstelsels plaasvind. Die beleid van die Suid-Afrikaanse regering vereis dat omvattende strategiese vervoerplanne deur die metropolitaanse vervoer owerhede voorberei word. Daar word van hierdie planne verwag om aan die nasionale strategiese doelwitte, asook die plaaslike bestaande en langtermyn doelwitte te voldoen. Hierdie beplanning word vereis deur 'n omgewing wat nuut is vir die meeste rolspelers en bestaan uit multi-modale, multi-operateur en openbare-private vennootskap scenario's. Die tekort aan ondervinding gaan gepaard met 'n tekort aan 'n bestaande model wat gebruik kan word om hierdie scenario's te hanteer. So 'n model word deur hierdie verhandeling beskryf. Die model is gebasseer op die beginsels van strategiese logistieke bestuur wat algemeen gebruik word in die handel en industrie, insluitende die diens-georïenteerde industrieë. Die modelleringsproses wil dus 'n kombinasie van diens aan kliënte en langtermyn doelwitte bereik. Die model bestaan uit onderskeie komponente en stappe: • 'n Vervoernetwerkmodel (Emmel2) }i;> 'n Multi-klas, veralgemeende-koste toedeling van private en openbare vervoeraanvraag op 'n netwerk, aangepas om modusloos te wees vir die openbare vervoergebruiker, word uitgevoer. Hierdie toedeling laat nie net die heffing van meer konvensionele kostes, soos reiskoste toe nie, maar ook veralgemeende kostes wat staatsbeplarmingsdoelwitte reflekteer. In hierdie opdrag word die interaksie van openbare- en private vervoer ondersoek waarvan die uiteinde 'n geassosieerde modale keuse is. }i;> 'n Reeks enkelklas veralgemeende koste toedelings word dan gebruik om op openbare vervoeraanvraag te fokus en daardeur korridors van aanvraag, wat gepas is om openbare vervoerroetes te regverdig, te skep. Hierdie proses kan verfyn word om 'n plan te ontwikkel wat die verskuiwing van private vervoer na openbare vervoer sal bevorder. Dit laat ook die ontwerp van multi-periode roetes toe. }i;> Die resultate van hierdie modelleringsproses word uitgevoer na 'n tekslêer en dan aan die prosesse, wat hier onder beskryf word, onderwerp. Die resultate van hierdie prosesse word dan ingevoer in die netwerkmodel waar 'n standaard publieke vervoertoedeling uitgevoer word. Dit word dan gebruik om die voorgestelde roetes te wysig en die netwerk data, met betrekking tot die aantal persone wat op en af klim by nodes, op te dateer. Hierdie inligting word gebruik vir die ontwerp van infrastrukture. • 'n Microsoft Access databasis en roete-ontrekkingsprogram );> Die netwerkmodel data word in die databasis ingetrek waar dit aan 'n roeteontrekkingsprogram onderwerp word. Hierdie program skakel die toedelingsresultate van die netwerkmodel om na 'n stel potensiële modus spesifieke openbare vervoerroete definisies. Hierdie roete definisies word gebasseer op paaie van maksimum aanvraag. Die ontrekkingsproses word deur parameters, soos minimum lengte van roetes en die vlak van aanvraag van verskeie kategorieë van diens, wat deur die beplanner gespesifiseer word, gekontroleer. );> Na die ontrekking van roetes, voertuigtoekenning en vervoertoedeling, voorsien die databasis besonderhede van die aantal persone wat op en af klim asook die aantal en details van vervoerroete wat elke node en skakel in die netwerk gebruik. Hierdie data word gebruik om infrastrukture te ontwerp. • 'n Microsoft Excel sigblad voertuig bedryfskoste model )i> Vir elke tipe voertuig word die bedryfskoste, volgens die verwagte afstand en spoed van die spesifieke voertuig, bepaal. Die resultate word gebruik om die keuse van voertuie vir verskillende roetes te bepaal. • 'n Lingo doelprogrameringsmodel );> Die potensiële roetes en die beskikbare of potensiële vloot word onderwerp aan 'n doelprogram waarin die optimum keuse van voertuigtoekenning bepaal word. Die toekenningsparameters kan deur die beplanner gekontroleer word. Die parameters kan onder andere kostes, energie, brandstofverbruik en voertuig- en roete beperkings, insluit. Multi-periode ontwerp is ingesluit in die modelleringsproses sodat die optimum ontwerp vir die bedryfsperiode, daaglikse of weeklikse siklusse, kan wees. Die modelleringsproses lewer twee hoofuitkomste: • 'n Stel volledig beskrywende en koste berekende vervoerroete wat, indien nodig, na die vlak van bestuurder instruksies, uitgevoer kan word. • Details van die tipe en plek van infrastruktuur wat benodig word deur die netwerk.
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Kang, Shugang. "Multi-agent based beam search for intelligent production planning and scheduling." Click to view the E-thesis via HKUTO, 2007. http://sunzi.lib.hku.hk/hkuto/record/B38977205.
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Knight, T. D. "The development of an integrated sales forecasting and production planning system for the brewing industry." Master's thesis, University of Cape Town, 1991. http://hdl.handle.net/11427/22187.
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Bibliography: pages 129-132.Considerable imminent in change on the this country. political and economic front is There is constant demand on businesses to improve productivity in the face of rising inflation, a trend that is unlikely to reverse given expected high wage demands. The liquor market is consider-ably influenced by government legislation and the state of the economy, hence companies operating within the liquor market are challenged with improving productivity in a changing environment. In order to facilitate productivity improvement, sales and production requirements need to be ascertained. The objective of this thesis is to design personal computer- based sales forecasting planning system that will aid a brewery productivity and minimise costs, through an integrated and production to maximise an ability to accurately forecast beer sales and translate such forecasts into efficient production plans. Fundamental to ensuring that the optimum production scenario is achieved is the need to generate a number of production scenarios for comparative purposes. To this end, the sales forecasting and production planning systems must be fully integrated, thereby allowing for the efficient generation of "what if" type analyses.
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Yang, Qinghao. "Design of an integrated CAD/CAPP system using spatial and graphic decomposition algorithm /." Hong Kong : University of Hong Kong, 1999. http://sunzi.lib.hku.hk/hkuto/record.jsp?B21129757.
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Gettman, Douglas Mark 1971. "A multi-objective integrated large-scale optimized ramp metering control system for freeway/surface-street traffic management." Diss., The University of Arizona, 1998. http://hdl.handle.net/10150/282797.
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This research, denoted MILOS (Multi-objective Integrated Large-scale Optimized ramp metering System) is a hierarchical structure for solution of the large-scale freeway management problem to address the key features of this problem (dynamic state changes, stochasticity, multi-dimensionality, unpredictability, partial-observability, and existence of multiple objectives). MILOS decomposes the freeway control problem into subproblems along temporal/spatial boundaries and is composed of three primary components: SPC-based anomaly detection and optimization scheduling, area-wide coordination layer, and predictive-cooperative real-time (PC-RT) optimization layer. The area-wide coordination component of the hierarchical control system considers the impact of queue growth on the adjacent interchanges in a quadratic programming optimization model with a multi-criterion objective function. The formulation of the area-wide optimization problem is augmented with overflow variables to guarantee a feasible solution. The nominal solution of the areawide coordination problem is then modified in real-time by the locally traffic-reactive, PC-RT algorithm based on a linear-program using a linearized dynamic difference equation implementation of the macroscopic FREFLO model. The PC-RT formulation pro-actively plans to utilize opportunities to disperse queues or hold back additional vehicles when freeway and ramp demand conditions are appropriate. The cost coefficients of this optimization problem is linked to the solution of the area-wide coordination problem by using information on the dual of the solution to the area-wide coordination problem. The optimization runs of the area-wide coordination problem and the PC-RT optimization problems at each ramp are scheduled by a demand/flow monitoring system based on statistical process control. A simulation experiment is executed to evaluate the MILOS hierarchical system against "no control", ADOT's current ramp metering policy, and an area-wide LP optimization problem resolved in 5-minute intervals on a small freeway network in the metropolitan Phoenix, AZ area. Three test cases are presented for a short "burst" of heavy-volume flows to all ramps, a 3-hour commuting peak, and a 3-hour commuting peak with a 30-minute incident occurring in the middle of the network. The performance results indicate that MILOS is able to reduce freeway travel time, increase freeway average speed, and improve recovery performance of the system when flow conditions become congested.
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Kang, Shugang, and 康書剛. "Multi-agent based beam search for intelligent production planning and scheduling." Thesis, The University of Hong Kong (Pokfulam, Hong Kong), 2007. http://hub.hku.hk/bib/B38977205.
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Page, Jessica Hendrieka. "A comparison of integrated transport and spatial planning instruments : a case study of the Eden district municipality, Hermanus local municipality and Cape Town metropolitan areas / Jessica Hendrieka Page." Thesis, North-West University, 2012. http://hdl.handle.net/10394/8512.
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In the field of city planning, a growing need exists for the integration of spatial development with transportation planning instruments. This study identifies issues related to the definition, evaluation and implementation of the integration of sustainable development and sustainable transportation within three types of municipalities.
Significant issues that are explored include the various definitions of integration; the range of issues considered under notions of integration; the diverse perspectives on, and criticism of development and transportation integration analysis, as well as approaches to evaluating integration and transportation impacts on development. Furthermore, the study reports on the goals of each municipality, specifically with reference to sustainable public transportation decision-making; approaches to sustainable transportation, automobile dependency; land use; and finally, on sustainable transportation and development integration solutions.
Approaches to spatial development used to focus on the organisation of land use issues, but this field is increasingly defined more broadly to include economic and social welfare, quality of human health/life and environmental integrity. From a sustainability perspective, a narrow definition of sustainable transportation tends to favour individual technological solutions, while a broader definition tends to favour more integrated solutions, including improved travel choices, economic incentives, institutional reforms, land use changes as well as technological innovation. Integration focuses on the teamwork required between the relevant departments as well as between levels or spheres of government, and often entails the implementation of nodal-corridor approaches. Sustainability planning may require changing the way people think about solutions to transportation problems in the future.
The literature survey (Chapter 2) addresses a number of salient concepts, namely transportation and spatial development integration, public transportation and its orientated development, nodal-corridor development, as well as environmental and development relationships. Furthermore, an investigation into the legislative frameworks and policies is presented with emphasis on spatial development, transportation plans and node-and-corridors development (Chapter 3).
This is followed in Chapter 4 by a report on an investigation into, and interviews held with representatives from the three municipalities (Hermanus local municipality, Cape Town metropolitan municipality and Eden district municipality) with reference to the integrated transportation plans (ITP) and spatial development frameworks (SDF) of these municipalities. This section reflects the opinions of relevant role-players regarding the central aspects of this study. Chapter 5 presents a summary of the study as well as a number of conclusions. In this chapter, planning recommendations are provided with the aim of advising municipalities on possibilities for the integration of sustainable transportation plans and spatial planning / development instruments.Thesis (M.Art. et Scien. (Urban and Regional planning))--North-West University, Potchefstroom Campus, 2012
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Arabi, Mohsen. "An optimization and simulation framework for integrated tactical planning of wood harvesting operations and lumber production." Thesis, Université Laval, 2013. http://www.theses.ulaval.ca/2013/30029/30029.pdf.
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La planification tactique des opérations forêt-usines est centrée sur trois éléments principaux : la récolte, le transport et la transformation du bois. La planification de cette chaine d’approvisionnement est très complexe. Il existe déjà des outils pour faciliter la décision de décideur tels que FPInterface et Optitek, tous deux développés par FPInnovations. Cette mémoire vise à développer un module d’optimisation qui est connecté aux utiles de simulation. LogiOpt est constituée d'un modèle mathématique. Le modèle développé vise l’optimisation de la chaîne d’approvisionnement entre la forêt et l’usine en concentrant les efforts sur les activités que l’entreprise planifie conjointement avec son entrepreneur d’opérations forestières principal. Grâce à ces solutions de logiciels de simulation et de notre modèle mathématique, nous combinons à la fois dans notre cadre récolte, le transport, l'allocation des bois et des opérations de production. Pour tester notre model mathématique, nous avons utilisé les données d’une année d’exploitation à une entreprise québécoise œuvrant dans le milieu forestier. Nous avons comparé nos résultats avec un plan tactique manuel « simulé ». De ce fait, nous avons constaté que LogiOpt effectue une meilleure allocation de la matière première en allant récolter dans moins de blocs de récolte tout en utilisant des bois ayant un meilleur rendement en usine. Conséquemment, on produit plus de produits finis en usine tout en utilisant la même quantité de bois qu’un plan tactique plus traditionnel.Forest and sawmills tactical planning is based on three main elements: wood harvesting, wood transportation and wood transformation. Planning the whole supply chain, is quite complex. Tools have been built to help manager in his decision process, for example FPInterface and Optitek, which were developed by FPInnovations. The aim of this thesis is to develop an optimization module, LogiOpt, which will be integrated to simulation tools. LogiOpt is made of a mathematical model. The developed model aims at optimizing the supply chain between the forest and the mills. Using simulation software solutions and our mathematical model, we combine at the same time in our framework harvesting, transportation, wood allocation and production operations. To test our mathematical model, we used data obtained from one business year of a Quebec based wood manufacturer. We compared our results with a manual simulated tactical plan. In this regard, we observed that LogiOpt performs better in wood allocation between sawmills, harvesting in less harvesting while using wood with better output. We then end up producing more finished products at sawmills using the same wood quantity as a traditional tactical plan.