Reactive maintenance
Advantage:
- "Run until failure" - this concept reduces maintenance costs on equipment - until the equipment fails.
Disadvantage:- Increased costs due to unplanned downtime of equipment
Increased labour costs especially if overtime is needed. |  |
Preventive maintenance
Advantage:- Scheduled maintenance intervals reduce machine downtime (failure rate).
- Compared to reactive maintenance this can result in cost savings of approx. 12%.
Disadvantage:- Maintenance based on a time schedule leads to high labour costs and expensive part replacements
since components with remaining lifetime might also be replaced.
- Unplanned downtime cannot be excluded.
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Predictive maintenance or condition monitoring
Advantage:- Continuous monitoring detects the onset of component problems in advance.
- Maintenance is only performed when needed and can be planned in time.
- This can result in cost savings of another approx. 18% as compared to preventive maintenance.
- Costs for machine and process downtime are reduced.
- Costs for manpower and replacement parts are reduced.
Disadvantage:- The initial costs for standard monitoring systems such as thermography and vibration analysis can be very high.
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