The Golden Muffler Shop has decided to open a second garage bay and hire a second mechanic to handle installations. Customers, who arrive at the rate of about l 5 2 per hour, will wait in a single line until 1 of the 2 mechanics is free. Each mechanic installs mufflers at the rate of about m 5 3 per hour.

The company wants to find out how this system compares with the old single-server waiting-line system.

APPROACH c Compute several operating characteristics for the M 5 2 server system, using the equations in Table D.4, and compare the results with those found in Example D1.