On modeling ATC work load and sector capacity

This paper describes a semi-empirical, deterministic work load model and an evaluation procedure intended to aid in the design and evaluation of those units of airspace (sectors) under the jurisdiction of a team of air traffic controllers. The technique relates the traffic variables, route and sector geometry, and control procedures to an index that quantifies the work load required on the part of the air traffic control (ATC) team. Work load is considered to constitute the required sector evaluation criterion when maximum overall ATC facility capacity and manning efficiency are desired. With proper calibration, the model may be used to assess the impact on work load and sector capacity of future automation features. An example evaluation of an actual high altitude, enroute sector is included.