A Robust Planning to Determine the number of Ambulances for Emergency Medical Services

Ambulance base allocation is very important and necessary because if the number of active ambulances is sufficient, patients, injured person can be rescued. However the demand for ambulance in each area is not constant over time this makes it difficult to plan the number of ambulance efficiently .This paper presents a guide lines for appropriately determining the number of ambulances at each base by using a simulation model to find robust answers. Ideas presented in this paper can be used as a tool to assist for ambulance base allocation in real world. The simulation results show that if the appropriate number of emergency ambulances are allocated at each base, the average response time is decreased by 5.25 minutes and the coefficient of variation is decreased by 14.57% compared to the existing situation.