A single server queuing system has an average service time of 10 minutes per customer, which is exponentially distributed. The manager is thinking of converting to a system with a constant service time of 10 minutes. The average arrival rate will remain the same. The effect will be to:

Select one:

a.

decrease utilization.

b.

not have any effect since the service time is unchanged.

c.

increase the average waiting time.

d.

increase utilization.

e.

decrease the average waiting time.