A single-channel queuing system has an average service time of 16 minutes per customer, which is exponentially distributed. The manager is thinking of converting to a system with a constant service time of 16 minutes. The arrival rate will remain the same. The effect will be to:
A) increase utilization.
B) decrease utilization.
C) increase the average waiting time.
D) decrease the average waiting timE.
E) not have any effect since the service time is unchanged.

Question

Quizplus · Accepted Answer

Switching from an exponentially distributed service time to a constant service time reduces variability, which decreases the average waiting time in the queue. Utilization remains unchanged as the service rate and arrival rate are the same.

A Single-Channel Queuing System Has an Average Service Time of 16