What is the difference between preventive and predictive maintenance in CBM T6?

• A. Predictive maintenance is time-based; preventive uses data
• B. Preventive maintenance is time/use-based; predictive uses data/condition monitoring to predict failures and schedule maintenance
• C. They are the same
• D. Predictive maintenance eliminates maintenance entirely

Answer: (B)

The key idea is how maintenance decisions are driven. Preventive maintenance operates on a fixed schedule, based on time or usage, so service is performed at set intervals whether or not the equipment shows signs of wear. Predictive maintenance uses data from condition monitoring to assess the actual health of components, forecast when a failure or degradation will occur, and schedule maintenance just before that point. This data-driven approach aims to avoid unnecessary work while protecting reliability, using indicators like vibration, temperature, oil analysis, and other health measurements to inform timing. The correct statement captures that preventive maintenance is time or usage based, while predictive maintenance relies on condition data to predict failures and plan maintenance accordingly. The other options misstate the roles (or imply they’re the same or that maintenance could be eliminated).