Intuition tells us that simulation is a valuable tool for Army training; however, proving and quantifying this contribution remains difficult particularly for tasks with subjective performance standards. The Simulation to Mission Command Interoperability (SIMCI) organization, building on past efforts, has undertaken an exploration of this problem focusing on the role of constructive simulation in command and staff training. Establishing the value of simulation is made more difficult by the absence of clear training metrics for brigade staffs and the sensitivity of evaluation data. The approach is designed to incorporate hard and soft data for both cost and performance. A novel approach to cost uses software to capture the "would be" cost of entities in a simulation's scenario had they been live rather than simulated. The performance evaluations use methodologies described by the Government Accountability Office (GAO) and in the Army's Cost Benefit Analysis (CBA) guide. Performance data is captured using specially designed survey instruments. The paper touches on the methodology, data acquisition, data analysis and results. This study is intended to be a first step in developing guidelines and methodologies generalizable to assessing the value of simulation in other application areas.