Based on research completed at Indiana University, the author is proposing a diagnostic model for adult Christian education in the local church setting. The need for such a model is briefly examined. Then, the theoretical model is outlined and presented in graphic form. The proposed model explanation is limited to a discussion of "what" and "why." The question of "how' is left to the insight and skill of the reader. A rationale for the model's development, overall design, individual elements, sequencing, and application is included.