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Queueing Systems with Leadtime Constraints: A Fluid-Model Approach for Admission and Sequencing Control, European Journal of Operational Research

Abstract

We study how multi-product queueing systems should be controlled so that sojourn times (or end-to-end delays) do not exceed specified leadtimes. The network dynamically decides when to admit new arrivals and how to sequence the jobs in the system. To analyze this difficult problem, we propose an approach based on fluid model analysis that translates the leadtime specifications into deterministic constraints on the queue length vector. The main benefit of this approach is that it is possible (and relatively easy) to construct scheduling and multi-product admission policies for leadtime control. Additional results are: (a) While this approach is simpler than a heavy-traffic approach, the admission policies that emerge from it are also more specific than, but consistent with, those from heavy-traffic analysis, (b) A simulation study gives a first indication that the policies also perform well in stochastic systems, (c) Our approach specifies a "tailored" admission region for any given sequencing policy. Such joint admission and sequencing control is "robust" in the following sense: system performance is relatively insensitive to the particular choice of sequencing rule when used in conjunction with tailored admission control. As an example, we discuss the tailored admission regions for two well-known sequencing policies: Generalized Processor Sharing and Generalized Longest Queue. (d) While we first focus on the multi-product single server system, we do extend to networks and identify some subtleties.

Type

Article

Author(s)

Constantinos Maglaras, Jan A. Van Mieghem

Date Published

2005

Citations

Maglaras, Constantinos, and Jan A. Van Mieghem. 2005. Queueing Systems with Leadtime Constraints: A Fluid-Model Approach for Admission and Sequencing Control. European Journal of Operational Research. 167(1): 179-207.

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