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No-wait flowshops with flowtime minimization are typical NP-complete combinatorial optimization problems, widely existing in practical manufacturing systems. Different from traditional methods by which objective of a new schedule being completely computed objective increment methods are presented in this paper by which the objective of an offspring being obtained just by objective increments and computational...
In this paper, NP-hard no-wait flowshop scheduling problems with makespan minimization are considered. An iterative local search method is proposed which performs a randomized walk in the space of local optima until some stop criterion is satisfied. A perturbation mechanism and a compound neighborhood operator (or move ) are presented. The proposal is compared with the best algorithm so far. Experimental...
In the paper, the no-wait job shop problem with makespan minimization is considered, which is decomposed into the sequencing problem and the timetabling problem. Based on the non-delay timetabling procedure and the inverse timetabling procedure, an enhanced timetabling procedure is constructed by shifting jobs leftwards or rightwards to obtain better timetables. The two sub-problems are solved independently...
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