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In this paper, adaptive hybrid genetic algorithms (AHA0 ~ AHA3) are proposed for the sequence-dependent setup times permutation flow shop scheduling problem with the objectives to minimize makespan and total weighted tardiness, both of which will be considered separately. Each job is assigned an introduced inheriting factor, which indicates the probability that the job is copied to the same position of the offspring individual during crossover and is dynamically updated. Good genes and bad genes can be mined by inheriting factors. Probability-based Multi-Point Crossover (PMPC) is constructed to inherit good genes with high probabilities to the offspring and destroy bad genes with high probabilities. Inheriting factors determine such probabilities and the genetic algorithm evolves adaptively and is denoted as AHA0. Three local search methods (LS1, LS2, and LS3) are separately integrated with AHA0 and three hybrid algorithms AHA1 ~ AHA3 are developed. Compared with GA_RMA and CPSO (effective algorithms without integrating any local search), AHA0 is the most effective. Another six hybrid algorithms are extended from IG_RS (the current best algorithm for the two considered problems) and CPSO by integrating with the three local search methods and they are compared with AHA1 ~ AHA3 comprehensively. Experimental results show that for the two considered problems, AHA1 outperforms the other algorithms on small setup-time instances and AHA3 is the most effective algorithm among the compared ones on big setup-time instances, while the computation time of AHA1 is moderate among the LS1 integrated algorithms, so is AHA3. The effects of the key factors or parameters on algorithms are analyzed as well.
Automation Science and Engineering, IEEE Transactions on (Volume:9 , Issue: 3 )
Date of Publication: July 2012