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Abstract
In this paper, we address the problem of locating mobile service units to cover random incidents. The model does not assume complete knowledge of the probability distribution of the location of the incident to be covered. Instead, only the mean value of that distribution is known. We propose the minimization of the maximum expected response time as an effectiveness measure for the model. Thus, the solution obtained is robust with respect to any probability distribution. The cases of one and two service units under the nearest allocation rule are studied in the paper. For both problems, the optimal solutions are shown to be degenerate distributions for the servers.
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Acknowledgments
The authors would like to thank the suggestions made by two anonymous referees and the editor who have improved the readability and the final presentation of the paper. This research has been partially financed by Spanish research grants BFM2001-2378 and BFM2001-4028.
