Which document originally defined the Mandatory Sustainment Key Performance Parameter (KPP) and its Key System Attributes (KSA)?

The Mandatory Sustainment Key Performance Parameter (KPP) and its Key System Attributes (KSA) were originally defined in the Department of Defense's (DoD) Instruction 5000.02, which governs the operation of the Defense Acquisition System. This document outlines the requirements for successful program sustainment and emphasizes the importance of sustainment planning throughout the acquisition process. It aims to ensure that systems remain operationally effective and supportable throughout their lifecycle.