Defense projects typically take years of evaluation and multiple levels of justification prior to getting funded. During this time, technology may become obsolete and vendors may go out of business. Simulation results can now be used to determine technology compliance and continued project feasibility. VisualSim provides a visual panorama of the entire system. This can be particularly valuable for companies to share their system concepts and unique technology with decision makers. The VisualSim methodology provides a uniform view towards the relative merits of different technical approaches. It is also important for all the teams to develop a system model that can be easily exchanged.