In the Single-Server Model

Multiple Choice

In the single-server model,

A) the service time of a customer is most often described by an exponential distribution.
B) the service time depends on the number of customers in the system as long as there is at least one customer in the waiting line.
C) the mean of the service-time distribution must be as great as the target service time for a feasible solution.
D) service times are always constant to avoid large waiting lines.