1518	 An Experimental Model of System	 The problem of predicting the performance of modern computer systems is formidable. One general technique which can ease this problem is macroscopic simulation. This paper reports on the applicability of that technique to System . The paper describes an experimental model of System -its hardware software and its environment. The measures of system performance produced by the model consist of statistics relating to turnaround time throughput hardware utilization software utilization and queueing processes. The model is mechanized in SIMSCRIPT and consists of some statements. An auxiliary programs the Job Generator creates automatically the properties of System jobs that get simulated.
