Which of the following is an advantage of the FCFS dispatching rule when used in services?

A) FCFS is easy to update.
B) FCFS minimizes the average number of jobs in the system.
C) FCFS minimizes the average lateness of all jobs.
D) FCFS maximizes the number of jobs completed on time.
E) FCFS seems fair to customers.

FCFS dispatching rule gives an impression of fairness to customers, as the customers who arrive first are served first. However, FCFS has disadvantages in terms of average number of jobs in the system, average lateness, and number of jobs completed on time. Therefore, the advantage of FCFS in services is that it seems fair to customers.