PROTECTION STRATEGIES FOR CRITICAL RETAIL FACILITIES : APPLYING INTERDICTION MEDIAN AND MAXIMAL COVERING PROBLEMS WITH FORTIFICATION

概要

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Closing facilities due to a lack of demand is an unavoidable trend in areas experiencing decreasing populations. Strategies to prevent critical facilities from closing may be based on the concepts of maximum benefit or minimum cost. With the purpose of determining efficient strategies, we focused on a median and a maximal covering problem that considers two interacting players: interdiction and fortification. This study aims to develop an interdiction covering problem with fortification and compare it with a median problem. We specified the facilities to be grocery stores because justifying their protection is difficult given that they are private businesses; however, such protection is crucial because they provide a critical public service. First, we simulated the formulation on a linear urban space to explain the general characteristics and performance of the models. Second, we employed the formulation on a practical dataset to consider the heterogeneity of urban spaces. The result shows that, for models in a uniform space, the peripheral area is prioritized for protection when a lower level of damage is expected, while the central area is prioritized when more damage is expected. Moreover, these general characteristics can be sensitive to the spatial distribution of facilities.
2013-03-00