A waiting line meeting the assumptions of M/M/1 has an average time between arrivals of 15 minutes, and it services items in an average of 10 minutes each. What is the utilization factor?
A) 0.25
B) 0.33
C) 0.50
D) 0.67
E) 1.50

Question

Quizplus · Accepted Answer

Utilization factor is defined as the ratio of service time to the time between arrivals. 
Thus, utilization factor = (service rate)/(arrival rate) = (1/10)/(1/15) = 0.67. 
So, the correct answer is D.

A Waiting Line Meeting the Assumptions of M/M/1 Has an Average