Relating supply performance to aircraft availability

This paper describes how the effectiveness of the supply of vital repairable items for an aircraft or weapon system can be measured in terms of the expected number of aircraft grounded because of supply shortages. The properties of this measure are compared with the three alternative methods of assessing supply performance, none of which are directly aircraft or weapon system related. The present applicability of this measure to various situations at RAF Squadron and station level are discussed, together with possible future areas of application.