A system was designed and pilot tested for the evaluation of the products of educational research and development centers and laboratories. The products developed were: (1) a detailed specification of the evaluation procedure; (2) an empirically derived, validated, and reliable product taxonomy; (3) criteria for evaluation; and (4) the forms, instructions, manuals, and guidebooks necessary for product inventory, classification, evaluation, data tabulation, and summarization, and reporting of results. During field testing the first large-scale inventory and description of laboratory and center products ever made was carried out. A hitherto undeveloped theoretical model, based on the psychometric "method of successive judgments," was identified, elaborated, and operationalized in a new rating scale format. A 10 percent sample of completed products was selected on which to try out the evaluation system. Half of the products were evaluated with the experimental successive judgments rating method; the other half, with the usual single judgment method. Comparisons of the rating methods, the results of the product evaluations, suggested revisions in the evaluation paradigm and materials, and cost projections for operation of the system in alternative administrative contexts, were given. (Author/RC)