As the Air Force transforms from a garrisoned force into a light expeditionary force, one area for restructuring is the manner in which mobility readiness spares packages (MRSPs) are managed and stocked. For a war tasking, thirty days supply is typically deployed in a MRSP as it is assumed that there will be no re-supply for thirty days. Studies of combat operations from the past decade suggest that thirty days without re-supply is an outdated assumption. The objective of this thesis is to economically build a robust MRSP that is flexible enough to provide adequate support for a variety of squadron sizes at least through day 20 of a war. Faster establishment of a reliable re-supply pipeline is the key to successfully implementing such a MRSP. This research focused on three different weapon-systems; the A-10, F-15E, and F-16C. Through use of the Aircraft Sustainability Model, smaller MRSPs are constructed which have the ability to adequately support squadron sizes of 12, 18, and 24 aircraft based on their ability to maintain aircraft availability goals without generating excessive amounts of expected backorders