Training in this field is provided to personnel of Civil Aviation Authorities (or equivalent bodies) of ICAO Contracting States through participation in ICAO Traffic Forecasting and Economic Planning Workshops which are periodically conducted at the regional level. The workshop participants study forecasting methodology and other economic evaluation techniques and their applications for planning purposes of airlines, such as traffic and fleet planning; capacity planning of airports with respect to passenger, freight and aircraft movements; air navigation systems and services, including cost/benefit analysis for the implementation of communications, navigation and surveillance/air traffic management (CNS/ATM) systems. The air transport potential and outlook for the particular region and an exchange of views about related economic planning issues conclude such group training sessions.