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Preemptive Scheduling of Equal Length Jobs on Two Machines to Minimize Mean Flow Time

Author

Listed:
  • Lee A. Herrbach

    (AT&T Bell Laboratories, Naperville, Illinois)

  • Joseph Y.-T. Leung

    (University of Texas at Dallas, Richardson, Texas)

Abstract

We give an O ( n log n ) time algorithm to preemptively schedule n equal-length jobs with release times on two identical, parallel machines so as to minimize the mean flow time. The complexity of the general problem of minimizing the mean weighted flow time is also reviewed, both for nonpreemptive and preemptive scheduling.

Suggested Citation

  • Lee A. Herrbach & Joseph Y.-T. Leung, 1990. "Preemptive Scheduling of Equal Length Jobs on Two Machines to Minimize Mean Flow Time," Operations Research, INFORMS, vol. 38(3), pages 487-494, June.
    • Handle: RePEc:inm:oropre:v:38:y:1990:i:3:p:487-494
    DOI: 10.1287/opre.38.3.487
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    Citations

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    Cited by:

    1. Azizoglu, Meral, 2003. "Preemptive scheduling on identical parallel machines subject to deadlines," European Journal of Operational Research, Elsevier, vol. 148(1), pages 205-210, July.
    2. Lushchakova, Irene N., 2006. "Two machine preemptive scheduling problem with release dates, equal processing times and precedence constraints," European Journal of Operational Research, Elsevier, vol. 171(1), pages 107-122, May.
    3. Jiang, Xiaojuan & Lee, Kangbok & Pinedo, Michael L., 2021. "Ideal schedules in parallel machine settings," European Journal of Operational Research, Elsevier, vol. 290(2), pages 422-434.
    4. Lushchakova, Irina N., 2012. "Preemptive scheduling of two uniform parallel machines to minimize total tardiness," European Journal of Operational Research, Elsevier, vol. 219(1), pages 27-33.
    5. Bo Chen & Ed Coffman & Dariusz Dereniowski & Wiesław Kubiak, 2016. "Normal-form preemption sequences for an open problem in scheduling theory," Journal of Scheduling, Springer, vol. 19(6), pages 701-728, December.

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