A call center has a total of 12 telephone lines coming into its customer service department, which is staffed by 5 customer service representatives. On average, 2 potential customers call every minute. Each customer service representative requires, on average, 2 minutes to serve a caller. After great deliberation, management has decided to add another line, increasing the total to 13. As a result, the call center can expect the following:

a. The proportion of potential customers getting a busy signal will increase decrease be unchanged
b. Average flow time experienced by customers will increase decrease be unchanged
c. Average utilization of customer service representatives will increase decrease be unchanged

A call center has added a telephone line coming to its customer service department. The proportion of potential customer getting a busy line will decrease because now there is one additional line that can be used to serve caller. The average flow time experienced by customers will increase. Utilization of all the telephone lines shows the productivity of call center. The average utilization of customer service representative will increase because customer representative will have one more line to address the call by customers.