Browsing by Author "Sim, T."

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    ArticlePublicationOpen Access
    Computational comparison of five maximal covering models for locating ambulances
    (Wiley, 2009-01) Erkut, Erhan; Ingolfsson, A.; Sim, T.; Erdoğan, Güneş; Business Administration; Industrial Engineering; ERKUT, Erhan; ERDOĞAN, Güneş
    This article categorizes existing maximum coverage optimization models for locatingambulances based on whether the models incorporate uncertainty about (1) ambulanceavailability and (2) response times. Data from Edmonton, Alberta, Canada are used to test five different models, using the approximate hypercube model to compare solution quality between models. The basic maximum covering model, which ignores these two sources of uncertainty, generates solutions that perform far worse than those generated by more sophisticated models. For a specified number of ambulances, a model that incorporates both sources of uncertainty generates a configuration that covers up to 26% more of the demand than the configuration produced by the basic model.