condition-based maintenance

**Condition-based maintenance** is the **maintenance policy that triggers service actions when measured equipment condition exceeds predefined thresholds** - it replaces purely time-driven servicing with real equipment-state signals. **What Is Condition-based maintenance?** - **Definition**: Rule-based maintenance activation from live sensor readings and diagnostic indicators. - **Trigger Logic**: Examples include vibration limits, pressure drift, temperature rise, or particle count alarms. - **Difference from Predictive**: CBM uses threshold rules, while predictive methods estimate future failure probability. - **Deployment Need**: Requires reliable instrumentation and clear response procedures. **Why Condition-based maintenance Matters** - **Targeted Intervention**: Service occurs when evidence of degradation appears, reducing unnecessary work. - **Failure Risk Control**: Early threshold breaches provide warning before severe breakdown. - **Operational Simplicity**: Rule-based logic is easier to deploy and audit than advanced forecasting models. - **Cost Balance**: Often delivers better economics than strict calendar maintenance. - **Process Protection**: Rapid response to condition shifts helps prevent quality excursions. **How It Is Used in Practice** - **Threshold Design**: Set alarm and action limits from engineering specs plus historical behavior. - **Monitoring Infrastructure**: Integrate sensor data with dashboards and automated work-order triggers. - **Threshold Review**: Periodically recalibrate limits to reduce false alarms and missed detections. Condition-based maintenance is **a practical bridge between preventive and predictive approaches** - condition triggers improve maintenance timing with manageable implementation complexity.