Burrito King, a new fast- food franchise, has had problems with its drive- through window operations. Customers arrive at an average rate of one every 30 seconds. Current service time has averaged 25 seconds with a standard deviation of 20 seconds. A suggested process change, when tested, results in an average service time of 25 seconds with a standard deviation of 10 seconds. Assume that no customers are blocked or abandon the system.
a. As a result of implementing this change, will the average waiting time in queue increase, decrease, or remain unchanged?
b. As a result of implementing this change, will the average server utilization increase, decrease, or remain the same?