Evaluation research is applied research that is designed to assess the implementation of program goals and objectives of demonstration programs operated by public and private agencies. This is often done by Center staff by measuring the performance outcomes of individuals involved in the program, although the unit of measurement may vary. These programs are frequently funded by public sources. The evaluation usually includes (1) a process evaluation to examine the problems of project implementation (e.g., staffing, turnover, use of resources); (2) cost (benefit) savings analysis; (3) participant outcomes, such as reduced crime and/or drug use, employment, improved health and well-being of participants, sometimes called an impact evaluation; and (4) the lessons learned from the program with recommendations for future programs of the type studied.