Model accreditation: A rationale and process for determining a numerical rating

The proper development of a computer-based Operational Research OR model includes the process by which the modeler attempts to validate the model. This is done in order to convince the modeler (who usually does not need much convincing) and others (who should require a great deal of convincing) that the model can and should be used as an aid to decision making. But to use a model for complex decision problems, the paper must go beyond the notion of validation. In such situations, it now hears of model