Extending Graham's result on scheduling to other heuristics

  • Authors:
  • Robert R. Goldberg;Jacob Shapiro

  • Affiliations:
  • Computer Science Department, Queens College, City University of New York, 65-30 Kissena Blvd., Flushing, NY 11367-0904, USA;Department of Statistics and CIS, Baruch College, Zicklin School of Business, 17 Lexington Avenue, New York, New York 10010, USA

  • Venue:
  • Operations Research Letters
  • Year:
  • 2001

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Abstract

This paper considers the off-line scheduling problem where a list of jobs must be scheduled on k-parallel processors. The heuristic of Graham is relaxed to create a class of algorithms which includes many well-known algorithms such as best fit, first fit, random fit and greedy. We show that Graham's upper bound of 43-1/3k for the competitive ratios under the C"m"a"x norm applies to all algorithms of this class.