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In this talk we present results of an ongoing study, based on a problem of a textile factory. The core problem is an integrated lotsizing and scheduling one, characterized by sets of parallel machines, arbitrary demands and due dates for products, a compatibility matrix between machines and components and release dates of machines. In a solution, the quantities to produce by product/component/size are split among smaller lots, the machines in which those lots will be produced are determined, as well as the order in which they will
be done. We present a MIP model and results of a VNS heuristic.
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Pimentel, Carina; Alvelos, Filipe; Carvalho, J.M. Valério; Duarte, António J.S.T. (2009). Solution methods for an integrated lot sizing and scheduling problem. In EURO 2009 - 23rd European Conference on Operations Research. Bonn