Reengineering of the Emergency Service System under Generalized Disutility

Emergency medical service system structure is defined by deployment of service providing centers, number of which is usually limited. The objective of the designer is to minimize the total discomfort of all system users. Thus, the problem often takes the form of a weighted p-median problem. Since population and demands for service change in time and space, current service center deployment may not meet the requirements of the users and service providers neither. In this paper, we introduce a mathematical model for system reengineering under the generalized disutility, which follows from the idea that the individual user’s disutility comes from more than one located service center. At the moment of current demand occurrence, the nearest service center may be unavailable due to satisfying another arisen demand. Presented approach constitutes an extension of previously developed methods, where only the nearest center was taken as a source of individual user’s demand satisfaction.