This book describes a potential common operating system (COP) for the Air Force material sustainment system (MSS). The authors first develop a COP based on the principles of effects-based measures, schwerpunkt (organizational focus), decision rights, and a nonmarket economic framework, then they apply the COP to depot-level reparable component sustainment to illustrate how the COP would improve overall MSS efficiency and responsiveness.This book describes a common operating picture for the Air Force materiel sustainment system that, if implemented, would make the system more efficient and more responsive to changing operational needs.