The research and development (R&D) projects funded by the Florida Division of Vocational Education are intended to have utility for vocational educators in their efforts to improve vocational education programs and practices. This project was conducted to determine why some R&D products are accepted by potential users while others are not and to find alternative methods, procedures, and opportunities for providing feedback to media designers and diffusion personnel regarding the effectiveness of their decisions. The following procedures were used to achieve a holistic approach: (1) reviews of the literature on instructional design and diffusion of innovations; (2) interviews with professionals knowledgeable about the packaging and dissemination of instructional materials; (3) qualitative descriptions (scenarios) of "ideal" procedures; and (4) analysis of the flow of activities depicted in the scenarios to determine alternative opportunities for obtaining feedback. As a result of the project, a model was constructed that can be used by instructional designers and specialists. The model describes events that can have an impact on instructional materials usage and focuses attention on variables that can influence acceptance and use. Opportunities for obtaining feedback on design and design decisions are identified and the advantages and disadvantages of each opportunity are discussed. Appendixes include descriptions of five scenarios and the Purposes by Environments Matrix and a listing of references. (Author/KC)