Abstract: The multi-server queuing analysis can be used to estimate the average waiting time, queue lengths, number of servers and service rates. These queuing models approximate the performance of queuing systems with multiple queues. In this paper, we use the queuing theory to recognize the optimal number of required human resources in an educational institution carried out in Iran. The queue analysis is performed for different numbers of staff members. Finally, the result of this study shows that the staff members in this department should be reduced. Key words: Human resources planning Queuing theory Waiting time Performance measure