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Master's Dissertation
DOI
https://doi.org/10.11606/D.55.2007.tde-16062007-104244
Document
Author
Full name
Claudia Fink
E-mail
Institute/School/College
Knowledge Area
Date of Defense
Published
São Carlos, 2007
Supervisor
Committee
Arenales, Marcos Nereu (President)
Araujo, Silvio Alexandre de
Toledo, Franklina Maria Bragion de
Title in Portuguese
A programação de produção em fundições de pequeno porte: modelagem matemática e métodos de solução
Keywords in Portuguese
Problemas de dimensionamento de lotes
Programação da produção em fundições
Programação inteira mista
Abstract in Portuguese
Este trabalho trata de um problema de programação da produção em fundições de pequeno porte, que consiste em programar as ligas que devem ser produzidas em cada período do planejamento e como tais ligas devem ser usadas para a produção de itens sob encomenda, de modo que atrasos e custos operacionais sejam minimizados. Devido à certa incerteza nos dados do problema, a estratégia de horizonte rolante foi empregada. Este problema é representado por um modelo matemático de programação linear inteira mista. Neste trabalho foi desenvolvida uma heurística do tipo residual para obter uma boa solução inteira factível do problema, partindo da solução contínua encontrada pelos métodos relaxe-e-fixe e busca local
Title in English
The production planning is small-driven foundries: mathematical modeling and solution methods
Keywords in English
Lot-sizing problems
Mixed integer linear programming
Production planning in foundries
Abstract in English
This work addresses a planning production problem that arises in small market-driven foundries, which consists of programming a number of alloys that have to be produced in each period of the planning horizon and how these alloys should be used to producing ordered items, in such way that delays and operational costs are minimized. Due to uncertainties in the problem data, the strategy of rolling horizon was used. This problem is modeled as a mixed integer linear programe. In this work we developed a residual typed heuristic in order to obtain a good feasible integer solution of the problem, which are built from the continuous solution found by relax-and-fix and local search methods. Keywords: Lot-sizing problems, mixed integer linear programming, production planning in foundries
 
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Publishing Date
2007-06-16
 
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