Learn the difference between predictive and preventive maintenance, examples of predictive maintenance, its benefits, how it works, and how to best use it when given limited resources
Published 24 Aug 2021
Predictive maintenance is a strategic approach to optimizing equipment usability. Using data collected from IoT devices such as sensors, machine learning, and real-time equipment monitoring, predictive maintenance determines exactly when it's the best time to perform equipment maintenance. With this capability, maintenance managers save both time and resources.
Preventive maintenance involves doing whatever is required, regardless of the cost or strain on resources, to avoid equipment failure. Predictive maintenance, on the other hand, is focused on taking minimal action while still ensuring that equipment can be used for longer periods of time.
Another difference between predictive and preventive maintenance is that the latter requires frequent inspections, as these form the basis of when maintenance should be performed. With predictive maintenance, equipment conditions can be monitored remotely through the use of sensors and other IoT (Internet of Things) devices.
Data is at the heart of predictive maintenance. While the following are not straightforward examples of predictive maintenance, they do show how real organizations apply and use data to make more informed decisions and take action where it’s needed.
Example 1: BOS Solutions, a liquid solids separation organization in the oil and gas industry, used their data to predict equipment lifespan. This resulted in less defective or deteriorating equipment being used by workers, which led to a decrease in equipment-related injuries.
Example 2: National Grid UK, a natural gas and electricity transmission company, used their data to spot areas of poor performance, potentially risky areas, and areas of good performance.
By dividing their data into separate categories, the company was able to dive deeper into areas of non-conformance. Within these areas, they identified high-risk issues requiring immediate action. As a result, proactive behavior within the company increased and quality improved.
As seen with the examples in the previous section, using data for actions and decisions reaps huge benefits. Given the impact of data on business performance, maintenance managers should consider pursuing predictive maintenance as a proactive maintenance strategy.
While the other types of maintenance, such as preventive, corrective, planned, and condition-based, will not become obsolete in the near future, it’s wise for organizations to get a headstart in applying innovative ideas to their processes.
Below are the top 5 predictive maintenance benefits:
While applying predictive maintenance leads to concrete results, as stated in the section above, some maintenance managers may find it intimidating or overly complicated. To help clarify how predictive maintenance works, here is a simple outline of the process in 4 steps:
Step 1: Sensors collect real-time data on equipment conditions
Step 2: Data from sensors is processed by a predictive algorithm
Expected performance – For example, after 3 years in operation, equipment should still be producing at a rate of 1.5 units per minute
Past failure data – For example, before equipment failed, it produced only 0.3 units per minute and showed the following deterioration signs
Step 3: Powered by machine learning, the predictive algorithm generates predictions on when equipment will fail
Step 4: Based on these predictions, maintenance managers schedule maintenance to occur right before equipment failure or at the time recommended by the algorithm
Though how predictive maintenance works has been explained in general terms in the previous section, maintenance managers may still have difficulty seeing how they can apply a predictive maintenance strategy to their existing maintenance workflow.
This brief guide gives maintenance managers options on how to use predictive maintenance without the technical resources:
While predictive maintenance has many benefits, it cannot be applied to each equipment in operation since it generates large amounts of data from daily equipment monitoring. To conserve organizational resources, maintenance managers must start by only selecting a few pieces of equipment to monitor. The equipment chosen should:
Though using a predictive algorithm is the known prediction method for predictive maintenance, it requires maintenance managers to do either of the following:
a) Develop a predictive algorithm on their own
b) Hire a data scientist to develop a predictive algorithm
c) Purchase specialized software for predictive analytics
This is why predictive maintenance usually has a high barrier to entry. However, another option available to maintenance managers is to conduct their own predictive analysis.
Depending on the conditions maintenance managers want to monitor and their own preferences, a simple predictive analysis may evaluate a number of variables or factors which will help predict when equipment is most likely to fail.
For example, a basic predictive analysis would be taking a certain number of equipment performance issues in a week as a sign that equipment is about to fail.
If maintenance managers have decided to purchase predictive analytics software, it can also act as a database storing the equipment monitoring data collected by sensors.
For those who have not purchased predictive analytics software, an alternative digital solution is a predictive maintenance tool like iAuditor by SafetyCulture. iAuditor can be connected to different types of sensors, such as temperature, humidity, air particulate, gas, and air pressure.
Once maintenance managers have connected the sensors to their chosen database, they can proceed with installing sensors to the equipment.
After verifying that sensors are monitoring the correct equipment conditions and sending the data to the database in real-time, maintenance managers should set up alerts that will notify them when equipment conditions have reached a certain point.
When maintenance managers receive alerts from sensors, they can do either of the following:
a) Immediately schedule maintenance or send a maintenance technician on the way
b) For those using a predictive algorithm as their prediction method, they can schedule maintenance at the time recommended by the algorithm
c) For those relying on their own predictive analysis as their prediction method, they can evaluate this information against other factors and then decide when to schedule maintenance
iAuditor by SafetyCulture is a digital operations platform that assists maintenance teams in following or implementing standards, and monitoring maintenance tasks. Using iAuditor, maintenance managers can assign maintenance tasks and other repair jobs to service technicians.
Service technicians are able to document maintenance work completion. And, maintenance workers are able to perform investigations with the assistance of a digital checklist.
Quickly capture issues, such as equipment malfunction and failures. With iAuditor, the entire team can be empowered to work together and solve problems quicker.
🗹 Use iAuditor sensors or other sensor brands for continuous monitoring of humidity, air pressure, temperature, air quality, gas concentrations, and other environmental conditions. Set thresholds to alert teams when data moves outside of the set range.
🗹 Easily perform maintenance checks using mobile or tablet device
🗹 Assign and schedule maintenance tasks
🗹 Robust scheduling and notification features
🗹 Free plan available with up to 10 users
🗹 30-day free trial of premium plan available
Zarina is a content writer and researcher for SafetyCulture. She enjoys discovering new ways for businesses to improve their safety, quality, and operations. She is working towards helping companies become more efficient and better equipped to thrive through change.
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