Preventive and predictive maintenance are two closely related maintenance strategies. However, the two are not interchangeable. Understanding the difference between these two strategies will help managers deploy the correct strategy for every situation.
A Closer Look
Preventive maintenance aims specifically to safeguard against a range of known failure scenarios. It takes place according to time, meter, or in response to a particular event. For instance, proactively changing the oil in a vehicle every 9,000 miles is a form of preventive maintenance because mean time between failure (MTBF) statistics can be referenced for this interval.
Predictive maintenance has some other characteristics. These include:
- Occurrence according to the condition of the equipment rather than operational hours or other metric
- Sample readings are used to determine the condition of a piece of equipment
- Maintenance strategies are not deployed until the sample readings indicate that action is required
Predictive maintenance and preventive maintenance are becoming a must-have. According to IoT Analytics GmbH, Predictive/Prescriptive Maintenance of machines is considered as the most important application of Industrial Analytics in the 3 coming years for 79% of industry leaders. (Report: Industrial Analytics 2016/2017, December 2016)
Applying Maintenance Strategies
Both predictive and preventive maintenance have a valuable role to play. A CMMS can help equipment managers select the most effective maintenance strategy.
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