The workload of trainers for Army live force-on-force exercises is substantial due to the need to support the simulation of tactical systems and collect information on system employment. These activities pull trainers away from the important functions of coaching, mentoring, and presenting formal feedback. The fielding of new weapon and reconnaissance, surveillance, and target acquisition (RSTA) systems under force modernization will increase trainer exercise control and feedback (CAF) functions to a point that cannot be supported without interventions. Further, force modernization adds substantially to existing deficiencies in the intrinsic feedback needed to cue and guide performance during exercises and the extrinsic feedback needed to identify corrective actions for future exercises. Advances in tactical engagement simulation (TES) and instrumentation are the primary tools for reducing trainer workloads and addressing gaps in feedback, and the Army needs to know which concepts for new TES and instrumentation systems offer the greatest benefits. The goal of this project was to develop and apply an online database for assessing benefits of new TES and instrumentation concepts. This goal was addressed in three phases. First, we defined the set of trainer CAF functions and feedback gaps by examining 155 new and emerging weapon and RSTA systems. We identified 228 trainer CAF functions and 96 feedback deficiencies, with many of the functions and deficiencies applying to multiple tactical systems. Second, we developed information that could be used to weigh the value of addressing a specific CAF function or deficiency. We weighted CAF functions according to their tendency to distract trainers from coaching and mentoring responsibilities. We weighted trainer CAF functions and gaps in feedback according to the number of tactical systems to which the function or deficiency applied and the nearness of the tactical systems to their fielding dates. Third, we tried out the database by defining and assessing the value of 15 high level TES/instrumentation concepts. Collectively, the top five concepts eliminate 59 percent of the CAF functions and 75 percent of the feedback deficiencies.