Project schedules are logic models that focus on the timing of program activities. Value derives from the fact that schedule changes are not random. Why they occur, and how long they last, can reveal information that would not be easily revealed with other approaches to evaluation. Also, using project schedules as logic models forges a strong link between evaluation and program management. This article addresses three questions: How do models function in research? What makes project schedules a form of logic model? and How can evaluation data be gleaned from schedules? When using implementation schedules as a logic model, two guidelines must be observed. First, data collection must take place at regular intervals rather than be synchronized to program activities. Second, contact with stakeholders must respect their time commitments. The methodology will be illustrated with a case example from evaluating a "Peer to Peer" program to minimize unsafe electronic device use.