Performance analysis, as practiced by end users, appears to be dominated by the trial-and-error approach. Computer systems modeling techniques have been employed relatively infrequently by such users except for the sporadic application of commercially available computer system simulators. Vendors, on the other hand, have made extensive use of both analytical and simulation based techniques for performance analysis. This paper discusses some of the reasons why end users have failed to avail themselves of these techniques. It also identifies an area of performance analysis appropriate to the use of modeling techniques and discusses an approach to its investigation through their usage. 11 pp. Ref.
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