Preventive vs predictive maintenance: which approach fits the failure?
Compare fixed-interval work with condition-led intervention and learn why most equipment strategies need a considered combination of both.
Preventive maintenance acts at a planned time or usage interval. Predictive maintenance uses condition and performance data to estimate when intervention is required. Neither is universally better; the failure mode, risk and available data determine the better choice.
The fundamental difference
Preventive maintenance assumes an interval can reduce risk. Predictive maintenance looks for a measurable change—such as vibration, temperature, oil condition or performance—that indicates developing failure.
Predictive work can avoid unnecessary intervention, but only when the condition indicator provides enough warning and the organisation can collect and interpret it reliably.
When preventive maintenance is suitable
Use preventive tasks where deterioration relates reasonably to age or use, intervention is cost-effective and a safe task can restore resistance to failure. It is also common where a defined periodic check is required.
Simple recurring care such as lubrication, cleaning and scheduled proof testing often remains effective without advanced monitoring.
When predictive maintenance is suitable
Predictive methods suit important assets with detectable deterioration and enough lead time to plan a response. They are most valuable when failures are costly and unnecessary intrusive maintenance also carries cost or risk.
Sensors alone do not create a predictive programme. Thresholds, ownership, diagnostic competence and a route from alert to work are equally important.
Combining the strategies
A production asset might receive preventive lubrication, operator inspection and vibration monitoring at the same time. Each task addresses a different failure mode or layer of protection.
Use asset criticality and failure-mode analysis to choose the mix. Review false alarms, useful findings, avoided failures and task cost rather than labelling one strategy as inherently modern or superior.
Preventive vs predictive maintenance FAQs
Is predictive maintenance always cheaper?
No. Monitoring equipment, data management and specialist interpretation can outweigh the benefit on low-criticality or inexpensive assets.
Can CMMS software support predictive maintenance?
A CMMS can receive condition-triggered work, retain readings and connect the resulting action to asset history, although specialist monitoring may be performed by another system.
Can preventive and predictive maintenance be used together?
Yes. Most mature strategies combine preventive, predictive, inspection and run-to-failure decisions according to each failure mode.
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