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Synchronization of scarce resources for a parallel machine lotsizing problem
Christian Almeder; ernardo Sobrinho Simões de Almada LoboIn this paper we present a novel approach to tackle the synchronization of a secondary resource in lotsizing and scheduling problems. This kind of problem occurs in different manufacturing processes (e.g. wafer testing in the semiconductor industry, production and bottling of soft drinks). We consider a scenario of parallel unrelated machines which have to be equipped with a tool or need a special kind of resou...
Lead time considerations for the multi-level capacitated lot-sizing problem
Christian Almeder; Diego Klabjan; B. Almada-LoboThe classical multi-level capacitated lot-sizing problem is often not suitable to correctly capture resource requirements and precedence relations. We tackle this issue by explicitly modeling these two aspects. Two models are presented; one considering batch production and the other one allowing lot-streaming. Comparisons with traditional models demonstrate the capability of the new approach to deliver more rea...
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