Some Approximate Equilibrium Results for the Multi-Server Queue (M/G/r)^*

Abstract

Approximate formulae for the equilibrium average queueing time in the system M/G/r are derived. The degree of approximation achieved depends on the particular formula used and on the values of the various parameters involved. Of particular interest to the practitioner is a simple explicit formula; the relative percentage errors incurred seem to be below 2% for most practical purposes.