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An approach for solving the lot-sizing problem of a market-driven foundry / V. S. Tonaki in Journal of the operational research society (JORS), Vol. 61 N° 1 (Issue spécial) (Janvier 2010) 

Public ISBD [article]  in Journal of the operational research society (JORS) > Vol. 61 N° 1 (Issue spécial) (Janvier 2010) . - pp. 108–114 Titre : An approach for solving the lot-sizing problem of a market-driven foundry Type de document : texte imprimé Auteurs : V. S. Tonaki, Auteur ; F. M. B. Toledo, Auteur Année de publication : 2011 Article en page(s) : pp. 108–114 Note générale : Recherche opérationnelle Langues : Anglais (eng) Mots-clés : Foundry  Lot-sizing  Heuristic Index. décimale : 001.424 Résumé : Foundries can be found all over Brazil and they are very important to its economy. In 2008, a mixed integer-programming model for small market-driven foundries was published, attempting to minimize delivery delays. We undertook a study of that model. Here, we present a new approach based on the decomposition of the problem into two sub-problems: production planning of alloys and production planning of items. Both sub-problems are solved using a Lagrangian heuristic based on transferences. An important aspect of the proposed heuristic is its ability to take into account a secondary practice objective solution: the furnace waste. Computational tests show that the approach proposed here is able to generate good quality solutions that outperform prior results. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n1/abs/jors2008151a.html [article] An approach for solving the lot-sizing problem of a market-driven foundry [texte imprimé] / V. S. Tonaki, Auteur ; F. M. B. Toledo, Auteur . - 2011 . - pp. 108–114. Recherche opérationnelle Langues : Anglais (eng) in Journal of the operational research society (JORS) > Vol. 61 N° 1 (Issue spécial) (Janvier 2010) . - pp. 108–114 Mots-clés : Foundry  Lot-sizing  Heuristic Index. décimale : 001.424 Résumé : Foundries can be found all over Brazil and they are very important to its economy. In 2008, a mixed integer-programming model for small market-driven foundries was published, attempting to minimize delivery delays. We undertook a study of that model. Here, we present a new approach based on the decomposition of the problem into two sub-problems: production planning of alloys and production planning of items. Both sub-problems are solved using a Lagrangian heuristic based on transferences. An important aspect of the proposed heuristic is its ability to take into account a secondary practice objective solution: the furnace waste. Computational tests show that the approach proposed here is able to generate good quality solutions that outperform prior results. DEWEY : 001.424 ISSN : 0160-5682 En ligne : http://www.palgrave-journals.com/jors/journal/v61/n1/abs/jors2008151a.html