An architectural computer system was developed using modern small scale computers, to ease the interaction and conflict within the design team during the design process. The original proposal included an information file, a mathematical building model, and a subsystems (electrical, cost estimating, etc.) model. Due to unanticipated problems, the system was reduced to a limited building model, a material systems file, and a cost estimating capability with additional subsystems to follow soon. The system, as now operating, is of greatest value in cost estimating, giving a day-to-day cost picture. (JT)