What is the role of preventive maintenance (PM) in automation and how is its effectiveness evaluated?

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Preventive maintenance in automation aims to keep instruments and systems performing reliably by performing planned, regular care such as inspection, cleaning, calibration, part replacement, and software updates before failures occur. This approach helps safeguard measurement accuracy and system availability, which are essential for consistent analytical results and smooth workflow.

Evaluating its effectiveness involves looking at how well QC data stay stable and within spec, how often the instrument is up and running versus down, and whether failures or urgent repairs become less frequent. Documentation in maintenance logs provides traceability and supports trend analysis, showing whether MTBF improves and MTTR decreases over time. When PM keeps QC performance steady, minimizes downtime, and reduces unexpected issues, it demonstrates its value.