Problem 18-17 (Algo)

A priority waiting system assigns arriving customers to one of four classes. Arrival rates (Poisson) of the classes are shown in the following table: Use Table 18.4.

Class	Arrivals per Hour
1	4
2	5
3	7
4	5

Five servers process the customers, and each can handle 6 customers per hour. a. What is the system utilization? (Round your answer to 2 decimal places.)

b. What is the average wait for service by customers in the various classes? How many are waiting in each class, on average? (Round your answers to 3 decimal places.)

c. If the arrival rate of the second priority class could be reduced to 4 units per hour by shifting some arrivals into the third priority class, how would your answers to part b change? (Round your answers to 3 decimal places.)