On CP-utilization and processing times in an exponential CP-terminal system

This paper considers a closed queueing network model for the case of a number of different terminals sharing one central processor (CP). When there are two or more jobs at the CP it has to be decided which job to serve first.The servicing order will affect CP-utilization and responsetimes. It is shown that CP-utilization is usually rather insensitive to the servicing order, so that the main consideration, when deciding upon the priorities at the CP, may be the processing times