Ship Maintenance Dictionary Entry
Predictive Maintenance
"A proactive maintenance strategy that uses data analysis tools and techniques to detect anomalies in machinery operation and potential defects in equipment and processes so that you can fix them before they fail."
Definition
Predictive Maintenance (PdM) is a technique that uses condition-monitoring tools and techniques to track the performance of equipment during normal operation to detect possible defects and fix them before they result in failure. Unlike preventive maintenance which is schedule-based (e.g., every 500 hours), predictive maintenance is evidence-based.
How It Works
- Data Collection: Sensors collect real-time data on vibration, temperature, pressure, and oil quality.
- Analysis: Algorithms compare the current data against a "healthy" baseline or a "warning" threshold.
- Alerting: An alert is generated when the trend indicates a developing fault (e.g., rising bearing temperature).
- Intervention: Crew or shore teams schedule maintenance intervention just in time to prevent failure.
Advantages in Shipping
- Minimized Downtime: Prevents unexpected breakdowns at sea.
- Cost Savings: Avoids replacing parts that are still in good condition (which happens in strictly scheduled maintenance).
- Safety: Reduces the risk of catastrophic machinery failure.
Related Terms
Planned Maintenance System (PMS)Condition Based MaintenanceIoT