Which type of maintenance involves the complete overhaul of machinery?

The type of maintenance that involves the complete overhaul of machinery is corrective maintenance. This approach is taken when equipment has failed or is not performing as intended and requires significant repairs to restore it to proper working condition. Corrective maintenance typically follows a failure, aiming to fix the machinery after an issue has occurred, which can include extensive work such as replacing parts, rebuilding systems, or performing thorough system checks.

In contrast, routine maintenance refers to regular, often minor upkeep tasks performed to keep machinery running smoothly but does not usually involve complete overhauls. Preventive maintenance focuses on performing timely maintenance on equipment to prevent failures before they happen, addressing wear-and-tear before it leads to breakdowns, and usually involves less intensive work than overhauls. Predictive maintenance uses data-driven insights to assess equipment conditions and determine when maintenance should be performed, aiming to predict failures before they occur but not necessarily involving the overhaul of machinery.