Practical parallel simulation applied to aviation modeling

This paper analyzes the Detailed policy Assessment tool (DPAT) as an example of a practical real-world aviation simulation that uses optimistic simulation technology. We present a review of analyses that have used DPAT results to support their conclusions, and discuss the design and performance of the system in the context of parallel simulation. The thrust of this paper is to explain how DPAT avoids some of the problems associated with optimistic simulation, while exploiting its strengths. A key conclusion is that parallel simulation technology, particularly optimistic synchronization, needs to be built into the product from its conceptual design through implementation, as opposed to adding it afterwards.