The three faces of evaluation

Program evaluation can be used for three purposes: to learn about a program's operations and effects, to control the behavior of those responsible for program implementation, and to influence the responses of outsiders in the program's political environment. Most agencies fail to take full advantage of all three faces of evaluation. They begin their evaluation programs too late; they assign evaluation responsibilities to staffs which lack the requisite skills; or they yield to temptations to distort or suppress evaluation findings. The case of the evaluation of civil service reform demonstrates how these multiple purposes can be pursued together with constructive results. It also suggests several lessons of more general relevance.