Question: 44. Consider the priority queueing model of Section 8.6.2 but now suppose that if a type 2 customer is being served when a type 1

44. Consider the priority queueing model of Section 8.6.2 but now suppose that if a type 2 customer is being served when a type 1 arrives then the type 2 customer is bumped out of service. This is called the preemptive case. Suppose that when a bumped type 2 customer goes back in service his service begins at the point where it left off when he was bumped.

(a) Argue that the work in the system at any time is the same as in the nonpreemptive case.

(b) Derive W1 Q.

Hint: How do type 2 customers affect type 1s?

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