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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 results show the proposed algorithm outperforms the existing one in effectiveness and in efficiency.
Date of Conference: 16-18 April 2008