Tom Jones, the mechanic at Golden Muffler Shop, is able to install new mufflers at an average rate of 3 per hour (or about 1 every 20 minutes), according to a negative exponential distribution. Customers seeking this service arrive at the shop on the average of 2 per hour, following a Poisson distribution. They are served on a first-in, first-out basis and come from a very large (almost infinite) population of possible buyers.

We would like to obtain the operating characteristics of Golden Muffler’s queuing system.

APPROACH c This is a single-server (M/M/1) system, and we apply the formulas in Table D.3.