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A Diffusion Approximation to the Multi-Server Queue

Author

Listed:
  • Baruch Halachmi

    (University of Kansas, Lawrence)

  • W. R. Franta

    (University of Minnesota)

Abstract

Exact solutions to queueing problems with customer interarrival times and customer service times drawn from arbitrary (generalized) distributions have not been found. We are, therefore, much interested in good quality approximate solutions to such problems. This paper presents a methodology for obtaining (approximately) the distribution of the number of customers in a multiserver queue for which both the customer interarnval and customer service times are drawn from arbitrary distributions. The approximation is based on the theory of diffusion, depends only on the means and variances of the interarnval and service time distributions, and as the numeric examples attest is of very good quality when the queueing system is heavily loaded. The approximate solution is obtained via a very simple computational procedure, so that good quality approximate solutions to such problems can be easily produced.

Suggested Citation

  • Baruch Halachmi & W. R. Franta, 1978. "A Diffusion Approximation to the Multi-Server Queue," Management Science, INFORMS, vol. 24(5), pages 522-529, January.
    • Handle: RePEc:inm:ormnsc:v:24:y:1978:i:5:p:522-529
    DOI: 10.1287/mnsc.24.5.522
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    Cited by:

    1. Haryono, & Sivazlian, B.D., 1985. "Analysis of the machine repair problem: a diffusion process approach," Mathematics and Computers in Simulation (MATCOM), Elsevier, vol. 27(4), pages 339-364.
    2. Ward Whitt, 2004. "A Diffusion Approximation for the G/GI/n/m Queue," Operations Research, INFORMS, vol. 52(6), pages 922-941, December.

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