Process evaluation is defined as a study which describes, defines, and assesses those program dynamics and operations which are to produce some given outcome. The paper addresses the lack of comprehensiveness in criminal justice evaluations by presenting a number of assessment formats or sequences. This is considered a first step in promoting the productive use of complementary process evaluation. The aim is to provide a systematic framework within which process evaluation can be designed and adapted to fit particular programs. 'Prepackaged' comprehensive designs are not proposed; rather, a number of evaluation sequences considered generally applicable are outlined, and their respective advantages and disadvantages are indicated. The process component of an evaluation is examined for (1) before an experimental intervention, (2) during an experimental intervention but before a posttest, and (3) after the posttest but while the program or intervention is still intact. Various combinations of these sequences are also considered. Five evaluation studies in the criminal justice field are used to illustrate the potential of these sequences. The sample evaluations cover a neighborhood team policing experiment, a second team policing experiment, a pretrial intervention project, an inmate self-government experiment, and a specialized parole units experiment. Thirty-seven references and 31 footnotes are provided.