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The complete vertex p-center problem

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  • F. Antonio Medrano

    (Texas A&M University–Corpus Christi)

Abstract

The vertex p-center problem consists of locating p facilities among a set of M potential sites such that the maximum distance from any demand to its closest located facility is minimized. The complete vertex p-center problem solves the p-center problem for all p from 1 to the total number of sites, resulting in a multi-objective trade-off curve between the number of facilities and the service distance required to achieve full coverage. This trade-off provides a reference to planners and decision makers, enabling them to easily visualize the consequences of choosing different coverage design criteria for the given spatial configuration of the problem. We present two fast algorithms for solving the complete p-center problem: one using the classical formulation but trimming variables while still maintaining optimality and the other converting the problem to a location set covering problem and solving for all distances in the distance matrix. We also discuss scenarios where it makes sense to solve the problem via brute-force enumeration. All methods result in significant speedups, with the set covering method reducing computation times by many orders of magnitude.

Suggested Citation

  • F. Antonio Medrano, 2020. "The complete vertex p-center problem," EURO Journal on Computational Optimization, Springer;EURO - The Association of European Operational Research Societies, vol. 8(3), pages 327-343, October.
    • Handle: RePEc:spr:eurjco:v:8:y:2020:i:3:d:10.1007_s13675-020-00131-y
    DOI: 10.1007/s13675-020-00131-y
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    References listed on IDEAS

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    Cited by:

    1. Arie M. C. A. Koster & Clemens Thielen, 2020. "Special issue on: Computational discrete optimization," EURO Journal on Computational Optimization, Springer;EURO - The Association of European Operational Research Societies, vol. 8(3), pages 201-203, October.

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