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In this paper, permutation flow shop scheduling problem with total flowtime minimization is considered. Two composite heuristics, CH1 and CH2, are proposed which use LR (developed by Liu & Reeves) as index development phase and iterative RZ+FPE-R procedure as solution improvement phase. CH2 also adopts FL to construct a solution. CH1 and CH2 are compared with FLR1, FLR2 and IH7_FL (the best existing...
Fast computation methods are needed for the heuristics of flow shop scheduling problems in practical manufacturing environments. This paper describes a generalized flow shop model, which is an extension of the classical model, in which not all machines are available at time zero. The general completion-time computing method is used to compute completion time of generalized flow shops. The transform...
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