This booklet was prepared to assist planning and service agencies and personnel with evaluation and advocacy of programs and services for the developmentally disabled. Part 1 of the booklet deals with evaluation, part 2 with advocacy; discussed in both sections are such issues as the legislative mandate, the use of computerized systems, systems development, the role of the professional, and the role of state developmental disabilities councils. (Bibliographies relating to both evaluation and advocacy are included.) (BD)