Results are described for the first two phases of a study to develop and evaluate models of student progress in a technical training course being offered in a computer managed instructional environment at Lowry Air Force Base, Colorado. Several categories of models were developed in Phase I and defined by model type and by the type of variables used as predictors. In Phase II the models were evaluated using data collected on 368 students in an inventory management course. The evaluation consisted of parameter estimation and derivation of goodness of fit statistics. The results indicated that by using the performance information on the initial blocks of the course, more precise predictions of course completion time can be made than when only preassessment data are used. (Author/CMV)