Diagnostic Maintenance is a maintenance approach that focuses on identifying and resolving problems with equipment or assets. It involves the use of specialized tools and techniques to detect and diagnose faults or irregularities, and take corrective action to fix them. Diagnostic maintenance is often used in combination with preventive maintenance to ensure that equipment is running efficiently. It is an important part of any maintenance plan, as it helps to reduce downtime and improve equipment reliability. Diagnostic maintenance can also help to identify potential problems before they become serious, allowing for proactive maintenance and repair.