The methods, procedures, and results of a sensitivity test on NETMAN, a stochastic digital computer model designed to simulate the information collection and scoring control systems used in tactical warfare training exercises, are described. NETMAN enables its users to obtain information such as personnel requirements, training requirements, and workload alternatives in such systems as the Marine Corps' Tactical Warfare Simulation, Evaluation, and Analysis System (TWSEAS). The model had received preliminary sensitivity testing, and a more thorough program was required. Consequently the Army Research Institute instituted a program to complete a formal model sensitivity test and validation, and define the role of such exercise control models in system design and redesign. This report summarizes the first year's effort and provides the model validation results, including selection and collection of criterion data from actual military exercises and the comparison of model results against these measures. Conclusions indicate that the model can be used with increased confidence to predict the performance of training exercise control systems up to battalion level. (Author/LLS)