  This self-contained discussion relates the long-run average holding cost per
unit time to the long-run average response time per customer in a $G/G/1$ queue
with no assumption made on the order of service. The only restriction
established is that the system be ergodic. This is achieved using standard
queuing theory. The practical relevance of such a result is discussed in the
context of simulation output analysis as well as through an application to
formulating a Markov Decision Process that minimises long-run average response
time per customer.
