Predictive maintenance uses machine condition data - vibration, temperature, run hours - to service equipment just before it is likely to fail, instead of on a fixed calendar or after a breakdown.
Predictive Maintenance is a proactive maintenance strategy that uses data analytics, sensor monitoring, and machine learning to predict when equipment failures are likely to occur, enabling maintenance activities to be scheduled just before problems develop rather than responding to breakdowns or performing maintenance on fixed time intervals. Unlike reactive maintenance (fixing things after they break) or preventive maintenance (servicing on predetermined schedules regardless of actual condition), predictive maintenance monitors equipment health continuously through sensors measuring vibration, temperature, pressure, acoustics, power consumption, and other indicators. Advanced analytics identify patterns indicating deteriorating performance or approaching failure, often providing weeks of advance warning that allows scheduling repairs during planned downtime, ordering parts proactively, and avoiding the production disruptions and emergency costs associated with unexpected breakdowns.
How predictive maintenance works
The technology behind predictive maintenance has evolved dramatically. Traditional approaches relied on periodic manual measurements (vibration analysis, oil sampling, thermal imaging) performed by technicians on regular routes. Modern systems use permanently installed IoT sensors streaming data continuously to analytics platforms in the cloud or on-premise servers. Machine learning algorithms establish baseline "normal" patterns for each piece of equipment during healthy operation, then flag anomalies indicating potential problems. Some systems provide specific failure predictions ("this bearing will fail in approximately 18 days"), whilst others simply alert that equipment behaviour has changed and investigation is warranted. Integration with CMMS (Computerised Maintenance Management Systems) automatically generates work orders, orders required parts, and schedules technician time when predictions indicate maintenance needs.
Key points
- Sits between reactive (fix on failure) and preventive (fix on schedule).
- Avoids both unplanned downtime and servicing parts that were still healthy.
- Needs condition monitoring and a maintenance history to learn from.
Why it beats fixed-interval servicing
The business benefits are substantial. Unplanned downtime typically costs 3-5 times more than planned maintenance due to production losses, emergency labour rates, expedited parts shipping, and potential quality issues or safety risks. Predictive maintenance typically reduces maintenance costs by 25-30%, eliminates 70-75% of breakdowns, and reduces downtime by 35-45% according to industry studies. Equipment lifespan extends as problems are caught early before cascading damage occurs. Maintenance resources are used more efficiently, focusing on equipment actually needing attention rather than servicing things that could run longer. However, successful implementation requires investment in sensors, analytics platforms, and skills development, making phased approaches common. Many manufacturers begin with critical assets where downtime costs are highest, demonstrate value, and expand coverage progressively.
Maintenance and machine data
DynamxMFG records run time, downtime and downtime reasons against each machine, which is the history any predictive model needs. See resources.
Related terms
Knowing the words is the easy part
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