A simulation model of an academic medical center that was developed to aid in strategic planning and policy analysis is described. The model, designated MCM for Medical Center Model, was implemented at the School of Medicine, University Hospitals of Cleveland, and the private practices of the faculty in the clinical departments at University Hospitals. The model uses an approach known as system dynamics, which evolved from the application of feedback control theory to dynamic socioeconomic systems. The model is particularly well suited to incorporation of factors normally considered to be qualitative, and to assessing impacts of exogenous constraints and influences. In addition to using the system dynamics approach and the Dynamo language, MCM takes into account such factors as the effect of quality of plant and equipment on the ability to recruit faculty, the impact of level of student aid on the ability to recruit students, and the synergistic effects that appear in research productivity once an institution's programs exceed a certain minimum. The form and magnitude of the relationships involving such effects were generally estimated based on discussion with key people who have relevant experience in the institutions. The validity of such estimates is being assessed by setting parameters in the model so that it will react to a specific effect, and then reviewing model outputs with knowledgeable people. For illustration, the following three analyses are briefly examined: reduction of the Guaranteed Student Loan Program, hospital marketing, and reduction of indirect expense recovery by the National Institutes of Health. Diagrams of the model are appended. (SW)