Question $4$

Recall the waiting time formula for multiple parallel servers:

$s$ : the number of servers.

$C{V}_a$ : the coefficient of variation for the interarrival time.

$C{V}_p$ : the coefficient of variation for the service time.

$W_p$ : the average service time.

In what situation would the average waiting time decrease?

As the arrival rate increases.

As the utilization increases.

The mean of the service time remains the same, but the standard deviation of the service time

decreases.

The mean of the interarrival time remains the same, while the standard deviation of the interarrival

time increases.

As the number of servers decreases.