Providing a model for the issue of multi-period ambulance location

In this study, two mathematical models have been developed for assigning emergency vehicles, namely ambulances, to geographical areas. The first model, which is based on the assignment problem, ambulance transfer (moving ambulances) between locations has not considered. As can improve system efficiency by decreasing response time as well operational cost, we consider in second transportation problem. Both assume that demand of all must be met. major contributions study are: locations, day split into several slots, and distribution zone. To best our knowledge studied before. These extensions allow us a more realistic model real-world operation. Although, previous studies, maximizing coverage main objective goal, here, minimizing operating costs function objective, because assumed areas