Customers arrive at a service facility to get the required service. The inter-arrival and service times are constant and are 1.8 minutes and 4 minutes respectively. Simulate the system for 14 minutes. Determine the average waiting time of a customer and idle time of the service facility. -

Idle time of server = 0;

Average waiting time of customer $= (0+2.2+4.4+6.6+8.8+11+13.2+15.4+17.6+19.2)/10 \\ = 9.84 \text{minutes}$