CMA Intermediate · Operations Management and Strategic Management · Simulation and Line Balancing
In a single-server queue simulation, customer 1 arrives at minute 0 and customer 2 arrives at minute 4. Service times are 6 minutes for customer 1 and 5 minutes for customer 2. Service starts immediately when the server is free. What is the waiting time of customer 2 in the queue?
Customer 2 waits 2 minutes. Customer 1 occupies the server from minute 0 to minute 6, while customer 2 arrives at minute 4. Service for customer 2 begins at minute 6, so the queue waiting time is 6 minus 4, which is 2 minutes.
- A0 minutes
- B1 minute
- C2 minutesCorrect
- D6 minutes
Explanation
Customer 1 starts at 0 and finishes at 6. Customer 2 arrives at 4 and cannot begin until 6. Waiting time = 6 - 4 = 2 minutes. The 5-minute service time is not part of the wait.
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