Condition Based Maintenance Plus
Legacy sustainment runs on two models. Scheduled maintenance pulls a component at a fixed interval whether or not it needed pulling. Corrective maintenance waits for the failure and repairs it after the fact. The first discards serviceable life. The second deadlines the vehicle on a timeline the unit did not choose, and deadlined is the Army's word for a platform that cannot perform its mission.
Condition Based Maintenance sets the interval by the measured condition of the component instead. Sensors observe the part while the platform operates, and the work order follows the evidence. The Department's version is Condition Based Maintenance Plus. DoD Instruction 4151.22 established it as the primary sustainment strategy, directed for new systems and for integration into legacy fleets.