Maintenance system has proven to be a reliable way of ensuring machines and processes do not produce hazards or generate waste. While they all have one primary aim, it is important to note that there are different types of maintenance for different purposes.
Depending on what you aim, the type of machine, the frequency of use and most importantly the specifications and recommendations from the manufacturers and producers of the equipment and machines, there are 3 types of maintenance.
1. Corrective Maintenance
This type of maintenance is carried out following the detection of an anomaly and is aimed at restoring normal operating conditions.
It is based on the belief that the costs of downtime and repair in case of fault are lower than the needed capital to be invested for a maintenance program.
It may be cost-effective until a severe fault occurs.
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Advantages |
Disadvantages |
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Less or no planning needed |
Because it is not planned, the expenses
are uncertain |
|
Cost-effective for non-critical assets
|
Safety Issue can arise when machine breakdown |
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Simple to implement |
This can lead to a compliance issue |
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The best solution in some scenario |
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2. Preventive Maintenance
This type of maintenance is carried out at predetermined intervals or according to prescribed criteria, aimed at reducing the failure risk or performance degradation of equipment.
The maintenance cycles are planned according to the need. This type of maintenance helps to reduce the incidence of operating faults is reduced.
However, it is not always the right option for every of equipment. Sometimes the costs outweigh the benefits on older or less critical assets.
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Advantages |
Disadvantages |
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Reduced equipment downtime |
Upfront costs - keeping equipment well-maintained requires
investment |
|
Increases the life of machines and equipment |
More labour-intensive, require more workers |
|
Because it is planned it causes fewer interruptions to
critical operations |
Might cause over over-maintenance |
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Helps to improve workplace safety and machine safety compliance
|
|
3. Risk-Based Maintenance
This type of maintenance is carried out by integrating analysis, measurement and periodic test activities to standard preventive maintenance.
The gathered information is viewed in the context of the environmental, operation and process condition of the equipment in the system. The aim is to perform the asset condition and risk assessment and define the appropriate maintenance program.
All equipment displaying abnormal values is refurbished or replaced. In this way, it is possible to extend the useful life and guarantee over time high levels of reliability, safety and efficiency of the equipment.
4. Condition Based Maintenance.
Maintenance is based on the equipment performance monitoring and the control of the corrective actions taken as a result.
The real actual equipment condition is continuously assessed by the online detection of significant working device parameters and their automatic comparison with average values and performance. Maintenance is carried out when certain indicators give the signaling that the equipment is deteriorating and the failure probability is increasing.
This strategy, in the long term, allows reducing drastically the costs associated with maintenance, thereby minimizing the occurrence of serious faults and optimizing the available economic resources management.
Therefore, maintenance culture is a pivotal in ensuring safety workers and adequate return of investment for organizations.
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