Maximizing the weighted number of just-in-time jobs in flow shop scheduling

  • Authors:
  • Byung-Cheon Choi;Suk-Hun Yoon

  • Affiliations:
  • Department of Industrial Engineering, Seoul National University, Seoul, South Korea;Department of Industrial and Information Systems Engineering, Soongsil University, Seoul, South Korea 156-743

  • Venue:
  • Journal of Scheduling
  • Year:
  • 2007

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Abstract

In this paper we consider the maximization of the weighted number of just-in-time jobs that should be completed exactly on their due dates in n-job, m-machine flow shop problems. We show that a two-machine flow shop problem is NP-complete. When job weights are all identical, we show that the problem can be solved in polynomial time. We also show that a three-machine flow shop problem with identical job weights is NP-hard in the strong sense by reduction of the 3-partition problem.