The following is the December 2022 Government Accountability Office report, Military Readiness: Actions Needed to Further Implement Predictive Maintenance on Weapon Systems.
From the report
The Department of Defense (DOD) issued an interim predictive maintenance
policy in 2002, but the military services made limited progress implementing it
until recently. In 2007, DOD instructed the military services to designate a single
focal point for predictive maintenance, provide funding, and begin...
https://news.usni.org/2022/12/09/gao-report-on-predictive-maintenance-on-weapons-system