The intention of the Maintenance analysis is to contribute in the optimisation of equipment and increase the focus on the maintenance function. This will in turn have a flow on effect to the spare part philosophy to be used, in addition this will force the review of the physical effectiveness of the maintenance carried out.
The establishment of any Maintenance program should be based on sound risk and reliability methods. The resultant from these analysis will form the core information during the decision making process.
This shall include the following methods:
- Criticality Analysis
- FMECA (Failure Modes Effects and Criticality Analysis)
- RCM (Reliability Centred Maintenance)
- RBI (Risk Based inspections)
The methods above will be based on the following fundamental considerations:
- A documented evaluation for the risk of losing equipment function.
- All failure modes will be assessed if preventative maintenance is the best strategy.
- An in depth understanding of equipment service conditions and operational function and possible consequence of a failure to occur.
- Any valid data or information from other similar equipment or facilities
After the criticality analysis has been preformed and risk rankings assigned a screening process should be used to determine which equipment will need a more detailed analysis either RCM or FMECA. The detailed RCM process should only be used for equipment that will gain substantial benefits in relation to costs and safety.
The selection criteria to perform detailed analysis should be based on the following criteria:
- Equipment not subject to this type of study previously.
- Maintenance Costs
- Technical Complexity
All equipment that is considered suitable for RCM analysis will undergo a FMECA in order to identify relevant failure modes, failure causes and the most effective method to mitigate the particular failure mode.
Equipment that is not subject to a more detailed analysis will be assigned a PM program based on past and present practices and vendor recommendations.