PPM stands for "Planned Preventive Maintenance." It is a maintenance strategy that involves performing regular, scheduled maintenance activities on equipment or assets to prevent them from breaking down or failing. PPM is typically performed at set intervals, such as weekly, monthly, Quarterly or annually, and is based on the manufacturer's recommendations or industry best practices.

The goal of PPM is to identify and address potential issues before they become major problems, thus reducing the risk of unplanned downtime and increasing the reliability and lifespan of equipment or assets. PPM can include activities such as inspections, cleaning, calibration, and replacement of worn parts. PPM is commonly used in facility management to keep building systems, equipment, and infrastructure running smoothly and efficiently.