A stare driver's license exam center would like to examine its poeration its operation for potential improvement Arriving customer enter the building and take a number to determine their place in line for the written exam is self administerd by one of five electronic testers . the testing times are distributed as EXPO(8) :
all times are in minutes Thirteen of the customers fail the test with lots of questions ) These customers are given a booklet on the state driving rules for further study and leave the system (on foot) . The customers who pass the test select one of two photo booths where their picture is taken and the new license issued. The photo booths have separate lines, and the customers enter the line with the fewest number of customer waiting in queue , ignoring whether anyone is in service ; if
there is a tie, they enter the nearest booth, Booth 1 . Note that set of rules could lead to what might appear to be irrational customer behavior in the case that neither booth has a queue (i.e., the lengths of both queues are zero) Booth1 is Busy,