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A modified LPT algorithm for the two uniform parallel machine makespan minimization problem

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  • Koulamas, Christos
  • Kyparisis, George J.

Abstract

We propose a modified longest processing time (MLPT) heuristic algorithm for the two uniform machine makespan minimization problem. The MLPT algorithm schedules the three longest jobs optimally first, followed by the remaining jobs sequenced according to the LPT rule. We prove the tight worst-case ratio bound of for the MLPT algorithm which is an improvement over the tight worst-case ratio bound of 1.28 for the LPT algorithm.

Suggested Citation

  • Koulamas, Christos & Kyparisis, George J., 2009. "A modified LPT algorithm for the two uniform parallel machine makespan minimization problem," European Journal of Operational Research, Elsevier, vol. 196(1), pages 61-68, July.
    • Handle: RePEc:eee:ejores:v:196:y:2009:i:1:p:61-68
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    References listed on IDEAS

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    1. Koulamas, Christos & Kyparisis, George J., 2008. "An improved delayed-start LPT algorithm for a partition problem on two identical parallel machines," European Journal of Operational Research, Elsevier, vol. 187(2), pages 660-666, June.
    2. Paul Mireault & James B. Orlin & Rakesh V. Vohra, 1997. "A Parametric Worst Case Analysis of the LPT Heuristic for Two Uniform Machines," Operations Research, INFORMS, vol. 45(1), pages 116-125, February.
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    Cited by:

    1. Guo, Shouwei & Kang, Liying, 2010. "Online scheduling of malleable parallel jobs with setup times on two identical machines," European Journal of Operational Research, Elsevier, vol. 206(3), pages 555-561, November.
    2. Beezão, Andreza Cristina & Cordeau, Jean-François & Laporte, Gilbert & Yanasse, Horacio Hideki, 2017. "Scheduling identical parallel machines with tooling constraints," European Journal of Operational Research, Elsevier, vol. 257(3), pages 834-844.
    3. Chang, Zhiqi & Ding, Jian-Ya & Song, Shiji, 2019. "Distributionally robust scheduling on parallel machines under moment uncertainty," European Journal of Operational Research, Elsevier, vol. 272(3), pages 832-846.
    4. Ivar Massabò & Giuseppe Paletta & Alex J. Ruiz-Torres, 2016. "A note on longest processing time algorithms for the two uniform parallel machine makespan minimization problem," Journal of Scheduling, Springer, vol. 19(2), pages 207-211, April.

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