The theory for validating computerized business simulators proposed in this article is based on several premises derived from the research literature. Unique to the theory is the use of a hypothesis test and a methodology to describe the behavior of a simulator
from
the perspective of the student. THE EXECUTIVE GAME is validated to demonstrate the methodology of the theory. THE EXECUTIVE GAME is shown to be unstable, but it is suitable for the development of forecasting skills using exponential smoothing models. It is also shown that the proposed validation methodology reveals much more about the behavior of a simulator than existing validation methods. The theory should help simulation users choose simulators that closely match the learning goals of the courses in which computerized business simulators are used.