The NBAA Forum for Enhanced Reliability and Maintainability Standards (FERMS) provides a framework for measuring the reliability of business aircraft. Two strict formulas and definitions describe these measures in terms of dispatch reliability and operational availability:

调度的可靠性 is the percentage of scheduled departures that do not incur a delay, 取消, 掉头或改道.

业务可用性 is a measurement of the percentage of time the aircraft is available for flight. It is defined as the ratio of time that the aircraft is available divided by total time, in hours.

要使用这些公式, 运营商 enter relevant maintenance events for their aircraft, tracking the number of flight hours and landings at the time of each event. The resulting data will help validate product-selection decisions and better manage operationally controllable elements.

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下载FERMS PDF资源(1.3 MB, PDF)