operational acceptable level of traffic
operational acceptable level of traffic (OALT)
An air traffic activity level associated with the designed capacity of a sector or an airport. The OALT normally is considered the total number of aircraft that any air traffic functional position can accommodate for a defined period of time under a given set of circumstances. The OALT considers dynamic changes in staffing, personnel experience levels, equipment outages, operational configurations, weather, traffic complexity, aircraft performance mixtures, transitioning flights, adjacent airspace, handoff/point responsibilities, and other factors that may affect an air traffic operational position or system element.