Can program evaluation be saved from its enthusiasts?

Program evaluation--the use of scientific techniques to measure the value of an agency's work--has become the focus of major attention and enthusiasm in mental health service planning and administration. However, the author points out that completed program evaluation studies are few in number and provide no evidence of great impact on the operation of programs or agencies and that unrealistic enthusiasm for program evaluation can lead to unrealistic rejection when performance fails to reach promise. He concludes that program evaluation should be applied only when it can have an impact, i.e., in a limited number of carefully selected cases.