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dc.contributor.authorAraujo, Silvio A. de-
dc.contributor.authorArenales, Marcos N.-
dc.contributor.authorClark, Alistair R.-
dc.identifier.citationComputers and Operations Research, v. 35, n. 3, p. 916-932, 2008.-
dc.description.abstractA lot sizing and scheduling problem prevalent in small market-driven foundries is studied. There are two related decision levels: (1) the furnace scheduling of metal alloy production, and (2) moulding machine planning which specifies the type and size of production lots. A mixed integer programming (MIP) formulation of the problem is proposed, but is impractical to solve in reasonable computing time for non-small instances. As a result, a faster relax-and-fix (RF) approach is developed that can also be used on a rolling horizon basis where only immediate-term schedules are implemented. As well as a MIP method to solve the basic RF approach, three variants of a local search method are also developed and tested using instances based on the literature. Finally, foundry-based tests with a real-order book resulted in a very substantial reduction of delivery delays and finished inventory, better use of capacity, and much faster schedule definition compared to the foundry's own practice. © 2006 Elsevier Ltd. All rights reserved.en
dc.subjectLot sizing and scheduling-
dc.subjectMixed integer programming-
dc.subjectHeuristic algorithms-
dc.subjectInteger programming-
dc.subjectProblem solving-
dc.subjectTabu search-
dc.titleLot sizing and furnace scheduling in small foundriesen
dc.contributor.institutionUniversidade Estadual Paulista (UNESP)-
dc.contributor.institutionUniversidade de São Paulo (USP)-
dc.contributor.institutionUniversity of the West of England-
dc.description.affiliationInstituto de Biociências Letras e Ciências Exatas Departamento de Ciências da Computação e Estatística, Sao Jose do Rio Preto, SP 15054-000-
dc.description.affiliationInstituto de Ciências Matemáticas e de Computação Departamento de Matemática Aplicada e Estatística Universidade de São Paulo, Caixa Postal 668, São Carlos, SP 13560-970-
dc.description.affiliationFaculty of Computing Engineering and Mathematical Sciences University of the West of England, Bristol, BS16 1QY-
dc.rights.accessRightsAcesso restrito-
dc.relation.ispartofComputers and Operations Research-
Appears in Collections:Artigos, TCCs, Teses e Dissertações da Unesp

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