1. A) In systems with variability in arrival and service times, as the arrival rate increases to become closer to the service rate what happens to the average number of customers in the systems? Assume inter arrival times and service times are expontially distributed.

A. L approaches 1

B L approaches infinity

C. L becomes stable

D. L is not related to the arrival rate

E. L drops to 0

1 B) In a system with four distinct production stops, the manager decided to double the capacity of the system by adding another machine at one of the steps. As a result, the capacity of the system increased but it did not double. Which of the following statements present is most reasonable explaination?

A. This would not be a problem if arrival time were variable

B. There were multiple bottlenecks after the machines was added

C. Another step becomes the bottleneck after the machine is added

D. Service time are highly variable

E. None of the above