Minimizing total completion time in two-machine flow shops with exact delays

  • Authors:
  • Yumei Huo;Haibing Li;Hairong Zhao

  • Affiliations:
  • Department of Computer Science, College of Staten Island, CUNY, 2800 Victory Boulevard, 1N-215, Staten Island, NY 10314, USA;Lehman Brothers Inc., New York City, NY 10019, USA;Department of Mathematics, Computer Science and Statistics, Purdue University Calumet, 2200 169th Street, Hammond, IN 46323, USA

  • Venue:
  • Computers and Operations Research
  • Year:
  • 2009

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Abstract

We study the problem of minimizing total completion time in the two-machine flow shop with exact delay model. This problem is a generalization of the no-wait flow shop problem which is known to be strongly NP-hard. Our problem has many applications but little results are given in the literature so far. We focus on permutation schedules. We first prove that some simple algorithms can be used to find the optimal schedules for some special cases. Then for the general case, we design some heuristics as well as metaheuristics whose performance are shown to be effective by computational experiments.