The accuracy of demand assessment will be significantly improved by the use of the Extended Flight Plan (EFPL) in the planning phase, meaning a Flight Plan enriched with detailed trajectory and flight performance information. This will also positively impact the ETFMS flight data (EFD) messages process. The better accuracy of the initial trajectory information provided by NM will improve traffic predictability in general, and more specifically facilitate the traffic complexity assessment both at local and central level. The implementation of Network Traffic Scenario management tools at NM level will also directly contribute to manage traffic complexity. Improved trajectory/constraint accuracy/awareness will also result in potential improvements to flight efficiency.