Abstract
A system of N unlimited queues and N time-discrete servers in series, is investigated. The input consists of N stochastic processes where requests which have been generated according to the i-th process leave the system after they have received serivice by servers 1, 2, ..., i. The holding-time distributions can be calculated by means of an equivalence theorem which holds under certain conditions for the service times. © 1978 Springer-Verlag.