An evaluation procedure, to be viable, must reflect a direct relationship between treatment procedures, assessment data. Rehabilitation personnel require assessment information that provides program direction. Decisions must be made about program and treatment activities. Treatment becomes psychoeducational task which utilizes the functional relationships discovered through direct evaluation or those based on hypotheses generated from assessment data. The primary task becomes one of describing individual as he functions in various environments and of identifying those environmental factors which influence his behavior. A general description should be provided of the environmental settings in which the behavior occurs as well as an enumeration of the specific antecedent stimulus events which cue or appear to cue the behavior. An impression should be gained as to the aspects of the environment which view the behavior as being of severe nature. The behavior problem may appear to be of a minor nature in one environmental setting but may be of considerable severity in numerous other settings.