Seyed Hamid Reza Pasandideh - Assistant Professor ,Department of Mechanic and Industrial Engineering, Islamic Azad University
Seyed Taghi Akhavan Niaki - Professor, Department of Industrial Engineering

In many service and industrial applications of the facility location problem, the number of required facilities along with allocation of the customers to the facilities are the two major questions that need to be answered. In this paper, a facility location problem with stochastic customer demand and immobile servers is studied. Two objectives considered in this problem are: (1) minimizing the average customer waiting time and (2) minimizing the average facility idle-time percentage.

Facility Location; Queuing Theory;Genetic Algorithm; Desirability Function