Lot Sizing
Mostrando 25-34 de 34 artigos, teses e dissertações.
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25. An heuiristic for the lot sizing problem in small market-driven foundries / Uma heurística para o problema de dimensionamento de lotes em fundições de mercado
The foundry sector is important to the economy as it produces basic components for many other sectors, to such an extent that its performance has a repercussion in other sectors. A recently published mixed integer-programming model for small market-driven foundries, which aims to minimize delays when delivering orders, was proposed in the literature. In this
Publicado em: 2006
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26. Abordagens para o problema integrado de dimensionamento e sequenciamento de lotes da produção de bebidas.
The object of this study is the integrated problem of lot sizing and scheduling of the soft drink production. Such problem consists of deciding how much to produce of each drink and in each period and in which sequence, in order to satisfy the demand and to minimize the costs of storage, backlogging and changeover. The set up times of the machines are sequen
Publicado em: 2006
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27. Otimização do processo de corte integrado à produção de bobinas - modelos e métodos de solução / Coupling cutting stock and lot sizing problems in the paper industry: mathematical model and solution methods
An important production programming problem arises in paper industries coupling mul- tiple machine scheduling with cutting stock. From machine scheduling the problem of determining the quantity of jumbos (large rolls of paper) of different types of paper to be produced in each machine arises. These jumbos are then cut to meet the demand for items (smaller ro
Publicado em: 2006
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28. Um modelo baseado em seleção de processos e dimensionamento de lotes para o planejamento agregado da produção em usinas de açúcar e álcool.
The main concern of this work is related with the development of an aggregate production planning model of a sugar and alcohol milling company. This mathematical model is based on the process selection model and the production lotsizing model, and aims to help the decision makers in the production planning and control process of determining the quantity of s
Publicado em: 2006
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29. Lot-sizing problem with several production centers
Neste trabalho, estudamos um caso particular do problema de dimensionamento de lotes, envolvendo o planejamento da produção de um único item em vários centros produtivos que não apresentam restrições de capacidade. A demanda pode ser atendida com ou sem atraso. Este problema surge da decomposição de problemas práticos, como o sistema de requeriment
Pesquisa Operacional. Publicado em: 2005-12
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30. Integrated two-stage lot sizing and scheduling problem / Problema conjunto de dimensionamento de lotes e programação da produção
A presente tese de doutorado apresenta, modela matematicamente e soluciona úm problema multinível de dimensionamento de lotes e programação da produção em um ambiente industrial com máquinas paralelas que apresentam restrições de capacidade, custos e tempos de preparo dependentes da seqüência. O problema é motivado pela realidade encontrada em um
Publicado em: 2005
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31. Qualidade e estabilidade de heuristicas de dimensionamento de lotes para sistemas de produção multi-estagios
This work considers the multi-stage lot-sizing problem with Tolling planning horizon for use in Material Requirements Planning production systems. Heuristic methods for assembly systems are generalized for general structure systems and then compared under static and rolling planning horizon conditions. Moreover, techniques for dealing with nervousness of pro
Publicado em: 1993
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32. Planejamento da produção em maquinas paralelas sob restrições de capacidade
The well known capacitated lot sizing problem has been studied intensively in the last years and it consists of the determination of a production plan which satisfies a known demand and defines how much to produce of each item in each period of a planning horizon. This work explores a model where the items can be produced by any of the multiple non-identical
Publicado em: 1993
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33. Otimização do planejamento da produção em sistemas multiestagios
t: Lot-sizing multistage problems consist in the deterrnination of the quantities to be produced in different periods of time to meet forecast demando The model considers capacity restrictions on resources and product structure, i.e., the products may depend on the purchase or the production of certain components. The model presented uses the concept of eche
Publicado em: 1993
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34. Problemas multi-estagios de dimensionamento de lotes com tempo não-zero de produção e capacidade finita
Hulti-Stage Lot-Sizing Problems with Non-Zero Lead Time are formulated as Integer Programming models in a manner suitable for use with a rolling planning horizon in capacitated and uncapacitated Material Requirements Planning systems. Two solution approcehes, one of strong euts and another that uses Lagrangian Relaxation are developed. Computational results
Publicado em: 1990