1. Preventive Maintenance
Preventive maintenance is a kind of maintenance strategy focusing on achieving periodical inspection or maintenance before failure happens on facility.
Preventive maintenance schedule is generally planned based on past failure records or facility/machine manufacturer's recommendation.
It is effective to reduce failure risk but not optimum way because actual facility situation is not monitored or considered.
2. Predictive Maintenance
Predictive maintenance is a kind of maintenance strategy focusing on monitoring actual situation of facility and predicting future failure risk.
It detects the sign of abnormality of future failure by achieving real time monitoring of machine situation with sensors or data analyzing tools.
It is possible to take countermeasures before failure happens and prevent unexpected sudden facility stop and then maximize the lifetime and occupation rate of facility.
3. Difference between Predictive maintenance and Preventive maintenance
Main difference is basis of maintenance plan.
Basis of Preventive maintenance is past experience or records but the basis of Predictive maintenance is real time actual situation or performance data of facility.
It can reduce unnecessary maintenance work improve productivity in case of Predictive maintenance because it is possible to make more precise maintenance plan by utilizing technology and data.
4. Advantages of Preventive maintenance
* Reduce risk of unexpected failure by regular maintenance
* Keep stable facility performance
* Prevent expensive repair cost of facility by failure
5. Advantages of Predictive maintenance
* Reduce facility downtime by future failure prediction
* Improve maintenance planning and optimize those work
* Reduce total production cost by facility lifetime extension
* Improve productivity and quality control