This evaluation instrument, designed to be used in self evaluation or outside evaluation of intermediate or regional educational unit media services, is based on a philosophy of "best professional judgment" supported by collected evidence. Data collection techniques are flexible and results go through several independent judgments before the "Implications for Decision Makers" is completed. Separate sections of the instrument deal with Materials Lending Library Services, Professional Library Services, Curriculum Laboratory Services, Production Services, Consultative Services, and Delivery Services. A user survey is suggested to assist in evaluation of these services. In addition to the services directly related to users, the instrument provides for evaluation of administrative services and code compliance. Some collection techniques are suggested, but centers are encouraged to explore other techniques or to consider application of needs assessment-evaluation techniques already in use. The instrument is designed for internal evaluation followed by external evaluation. For the on-site visit, external evaluators are divided into three teams of one or more persons each; one team assumes an advocacy role, one an adversary role, and the third the role of overall evaluator. (Author/RAO)