This digest examines features of both process and impact evaluations to help officials of youth programs assess the programs for which they are responsible. With proper planning, evaluation can be part of a program without having to compete for attention and resources with the services the program is trying to provide. A process evaluation examines the design, implementation, and content of a program and its data collection, analysis, and reporting activities. It is a management tool that can be used more than once, especially to see if a program is drifting away from its usual intent. Impact evaluation measures how the program has affected its participants. Youth outcomes are judged and their significance is evaluated through comparisons with nonparticipants or with participating youth with different characteristics. Even though most youth programs are small, local, and service-driven, program staff can take some simple actions to obtain data about the program to end up with useable data for evaluation. (SLD)