This paper presents a methodology developed through research, trade studies, and past experience for generating a specification for a "user-friendly" instructional system, taking proper account of specific training objectives, the training syllabus, crew tasks, and aircraft configuration. Instructor control/display requirements are established for each element of each training exercise. The control/display data are then converted into task-oriented formats that fit the overall schematic of the instructional system, task-oriented display and control being the basis of user-friendly instructional system development. At any given time during a training mission, the instructor is confronted only with the data and control options that are pertinent for that particular phase of the training exercise. Factors such as human engineering, decision-making, and workload of the instructor enter into the analysis.