This paper reports on pertinent aspects of business/enterprise modeling studies that were conducted with nine IBM customers using what are now called computer-aided software engineering (CASE) tools. Coming shortly after the recent AD/Cycle™ announcement and the increased focus in IBM on tool-supported (CASE) business/enterprise modeling, this description of actual modeling studies should be especially germane. The model definitions (dimensions) used in the studies correspond exactly to many of the dimensions used by AD/Cycle, DevelopMate™, and the Repository Manager™. Compelling business reasons for conducting the studies are identified.