Chairman of the Joint Chiefs of Staff Instruction (CJCSI) 3170.01F implemented a mandatory sustainment Key Performance Parameter (KPP) — Materiel Availability, along with two mandatory sustainment Key System Attributes (KSAs): Materiel Reliability and Ownership Cost. These metrics, along with Mean Down Time align with recent Joint Staff actions and establish a single set of sustainment metrics throughout a program’s life cycle. Goals for these four materiel readiness outcomes should be established early in the concept decision process, refined throughout the design development process, and then carried through as program baseline goals until system retirement. Status towards these goals should be reported at Program Reviews.