Which aircraft service concept emphasizes the order of arrival for service?

The concept that emphasizes the order of arrival for service is fundamentally based on the principle of first come, first served. This approach prioritizes fairness and simplicity in the management of aircraft service, ensuring that each aircraft is dealt with in the exact sequence it arrives. This method is often applied in various sectors, including air traffic control, where it facilitates efficient handling and minimizes the potential for confusion or conflict among aircraft waiting for takeoff, landing, or taxiing.

In contrast, Priority Routing refers to a service concept that allows certain aircraft, based on specific criteria like urgency or type, to receive preferential treatment, which does not take into account the order of arrival. Scheduled Departures involve a timetable that dictates when an aircraft is allowed to depart, regardless of its arrival order. Demand Management involves strategies aimed at optimizing the handling of air traffic based on fluctuating demand rather than arrival sequence. Each of these alternatives emphasizes different aspects of service management, but they do not prioritize the initial order of arrival as central to their operation.