An approach for solving the lot-sizing problem of a market-driven foundry

V S Tonaki and F M B Toledo
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V S Tonaki: Universidade de São Paulo
F M B Toledo: Universidade de São Paulo

Journal of the Operational Research Society, 2010, vol. 61, issue 1, 108-114

Abstract: Abstract 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.

Keywords: foundry; lot-sizing; heuristic (search for similar items in EconPapers)
Date: 2010
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DOI: 10.1057/jors.2008.151

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