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Until recently, the NEH heuristic of Nawaz, Enscore and Ham published in j 1983 was commonly regarded as the best constructive heuristic for solving the classic j strongly NP-hard problem of minimizing the makespan in permutation flow shops. The I long-lasting success of NEH inspired many researchers to propose improvements to the original heuristic. In this paper, we empirically examine recent modifications...
We study a two-stage flowshop, where each job is processed on the first (critical) machine, and then continues to one of two second-stage (dedicated) machines. We assume identical (but machine-dependent) job processing times. Jobs are processed on the critical machine in batches, and a setup time is required when starting a new batch. The setting assumes batch-availability, i.e., jobs become available...
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