A. J. Gonzalez, R. F. DeMara, and M. Georgiopoulos, "Vehicle Model Generation and Optimization for Embedded Simulation," in Proceedings of the 1998 Spring Simulation Interoperability Workshop (SIW'98), Orlando, Florida, U.S.A., March 9 - 13, 1998. Abstract: The development and use of Inter-Vehicle Embedded Simulation Technology (INVEST) offers several distinct advantages for 21st Century training environments. Benefits of embedded simulations include the ability to perform "in-situ" exercises on actual equipment, more direct provision of support for the wide array of equipment in the field, and a greater opportunity to develop new training exercises using much shorter lead times than previously possible with stand-alone training systems. Nonetheless, the INVEST program also presents several challenging, yet surmountable obstacles to interconnecting the real and virtual layers within their actual environments. These challenges include 1) how to more efficiently and effectively create, refine and maintain vehicle models, and 2) how to optimize the operation of these models within the INVEST environment, so as to best utilize the computing resources available on board the vehicle and the available communication bandwidth. Addressing these technology challenges remains a prerequisite to the feasibility of realistic INVEST simulations involving ground combat vehicles. In this paper, we describe a multifaceted investigation aimed at addressing these tasks.