This paper describes the multiple evaluation techniques which can be applied to one computer-based instructional system and the ways in which the data may be used. The Navy's Computer Managed Instruction (CMI) System is used as an example to illustrate the application of various evaluation strategies for solving problems associated with delivery system effectiveness, course material comparisons, variations of instructional strategies, and the daily management of instructional progress. Representative data are displayed which illustrate the uses of student data to facilitate the functioning of an operational CMI system. The uses are described on the basis of who actually uses the information for decision-making activities: the instructor, the schools, the system managers, or the instructional materials developer. (VT)