Consider a call center with three operators operating in parallel where operators take an average of 8 minutes to serve a client.

a. Assuming operators are available 100% of the time, what is the system's capacity in customers per hour?

b. Assuming that there are no backup operators and that operators take two 15-minute breaks and one 30-minute lunch during an 8-hour shift, what is the system's capacity?

c. Using the capacity from part (b), what will be the utilization of the operators if clients arrive at an average rate of 20 per hour?

d. How well do you think operators can keep up with demand in the scenario of part (c) (i.e., would you expect short or long lines of clients)?