Formulation of a Markovian model of the major processing delays of the VUCC DECsystem-1099

For several years there has been widespread interest in optimizing time sharing system performance through the analysis of probability models. In this paper the construction of a simple closed Markovian model of the Vanderbilt University Computer Center DECsystem-1099 is discussed and such a model is presented. The steps which remain in the development of the model - i.e., parameterization, verification, validation, and the use of the model for prediction - are discussed and methods for implementing these steps are proposed.