To evaluate the current societal role of voluntary and/or obligatory development services and their potential both at home and for global cooperative relationships, data from field surveys, institutional inventories, and individual interviews were analyzed from both developed and developing countries to classify major development service types, assess categories through individual case studies, discuss major policy issues affecting performance and cooperative relationships, and analyze international relationships. Case studies from Asia, Africa, Latin America, Europe, the U.S., Canada, and the United Nations filled categories of training and employment schemes, study services, social and technical development services, and foreign volunteer services. For each, program inputs and tasks were assessed, success factors discussed, problem areas and achievements identified, and performance indicators determined. Three priority policy issues emerged as requiring specific attention: recurrent development education, employment-orientation, and citizen participation as a mobilization process, with recommendations for each. It was found that development services move through stages of no cooperation, foreign assistance, partnership cooperation. Future relationships should enhance self-development through equal partnership. Other volumes describe services and summarize the study. (RS)