Given that there is no universal way to measure implementation fidelity, instructional designers developing instructional innovations may find themselves faced with the challenge of determining the extent to which teachers' implementation of an instructional model is faithful. This article contends that a faithful implementation is one in…

Reviews four different approaches to evaluation--decision-oriented, applied research, value-oriented, and systems-oriented--and suggests how each may be applied to the evaluation of instructional programs. Nine references are listed. (Author/CHC)

Discusses the historical development of "hard" and "soft" systems thinking traditions and examines how these traditions have been understood and applied in the field of instructional development. Proposes the need for a synthesis of the two traditions in planning, implementing, and evaluating instructional programs. (AEF)