Consider two systems with single server to serve customers. The following two scenarios describe how the waiting time is affected by variability (in customers’ arrival time and service time) and utilization (utilization is the demand rate over capacity rate): Fill in the blanks.
Scenario 1: Suppose two systems have the same utilization rate. The system with _________ (High/Low) variability has shorter average waiting time.
Scenario 2: Suppose two systems have the same variability. The system with _________ (High/Low) utilization has shorter average waiting time.