usage-based maintenance

**Usage-based maintenance** is the **maintenance method that schedules service according to measured equipment utilization such as cycles, run hours, or throughput** - it aligns intervention timing more closely with actual wear accumulation. **What Is Usage-based maintenance?** - **Definition**: Triggering maintenance tasks after specific operating counts instead of calendar time. - **Usage Metrics**: RF hours, pump cycles, wafer starts, motion cycles, or process chamber time. - **Data Requirement**: Reliable counters integrated with equipment logs and maintenance systems. - **Comparison**: More accurate than time-only schedules when duty cycles differ significantly. **Why Usage-based maintenance Matters** - **Wear Alignment**: Services assets when mechanical or process stress has actually accumulated. - **Cost Efficiency**: Reduces unnecessary early replacement on low-use equipment. - **Reliability Improvement**: Prevents late service on high-use assets that wear faster than calendar assumptions. - **Planning Precision**: Better forecasts for labor, shutdown windows, and spare consumption. - **Digital Operations Fit**: Pairs well with CMMS and automated runtime telemetry. **How It Is Used in Practice** - **Counter Mapping**: Define which usage metric best correlates with each component failure mode. - **System Integration**: Auto-ingest meter values into maintenance work-order scheduling logic. - **Threshold Calibration**: Refine service intervals using observed post-maintenance condition data. Usage-based maintenance is **a practical accuracy upgrade over calendar-only maintenance** - meter-driven scheduling improves both reliability outcomes and maintenance efficiency.