The focus of ASPAG is to address general and tool-overlapping issues, methods or developments in the field of airside simulation and performance assessment within Airport and TMA operations that apply to all analysts in that field. It is not intended to replace any existing tool specific user groups. The meeting provides a forum for all stakeholders - air navigation service providers (ANSPs), airport operators, airlines, consulting firms, research centers, universities, tool suppliers, etc. - to exchange best practices and identify a common methodology.