In developing a framework for decisionmaking the author addresses the problems of defining objectives and outputs, of measurement, of developing alternative programs to achieve given objectives, of predicting program performance, of evaluation, and of presenting a display of the results to the decisionmaker in a way that facilitates the decision. The Vienna Convention sets up the machinery for international cooperation in solving problems related to drugs, establishes specific control and enforcement procedures that require action by participating governments, and deals with licensing, inspection, prescriptions, recordkeeping, and export/import controls. The purpose here of evaluating the Convention is not the evaluation itself but to demonstrate what such an evaluation should include.