Scheduling about an unrestricted common due window with arbitrary earliness/tardiness penalty rates


Azizoglu M. , Webster S.

IIE TRANSACTIONS, vol.29, no.11, pp.1001-1006, 1997 (Journal Indexed in SCI) identifier identifier

  • Publication Type: Article / Article
  • Volume: 29 Issue: 11
  • Publication Date: 1997
  • Doi Number: 10.1080/07408179708966418
  • Title of Journal : IIE TRANSACTIONS
  • Page Numbers: pp.1001-1006

Abstract

We consider the NP-hard problem of scheduling jobs on a single machine about an unrestricted due window to minimize total weighted earliness and tardiness cost. Each job has an earliness penalty rate and a tardiness penalty rate that are allowed to be arbitrary. Earliness or tardiness cost is assessed when a job completes outside the due window, which may be an instant in time or a time increment defining acceptable job completion. In this paper we present properties that characterize the structure of an optimal schedule, present a lower bound, propose a two-step branch and bound algorithm, and report results from a computational experiment. We rnd that optimal solutions can be quickly obtained for medium-sized problem instances.