Published online by Cambridge University Press: 14 July 2016
Consider the following queuing system: A sequence of customers arrive at a service unit in a recurrent stream. A customer is of priority k with probability πk, k = 1, …, n. A class i customer preempts service of class k, k > i. Interrupted service is resumed without loss or gain in service time. Service is FIFO within classes. Service times for class k are drawn from a general distribution function Bk(t).
Using the method of phases and a resolution technique from the theory of Markov processes we obtain Laplace transforms of various distributions.