Utility testing for urban and regional models

The basic question posed is: How can a model of a major urban and/or regional subsystem (e.g. housing, health, education or transportation) be developed to maximize its utility for public policymakers? A technique to be used in the evaluation of the utility of such a model is presented. The proposed technique involves the construction of autility evaluation matrix. In constructing this matrix it is necessary to identify the following: (a) the potential users of the model, (b) the actions open to these users, and (c) the consequences which are considered by the users when evaluating alternative actions. Utility testing should become as commonplace and important as validity testing. The utility evaluation technique described in this paper is hardly the required test, but at least it can be viewed as a step in the right direction.