On the RCM Failure Mitigation tab of the equipment and location screens, you can enter mitigation strategies. Adding a PM Schedule to the equipment for example could reduce the chance on a certain failure mode occurring considerably. That reduction in probability then results in a lower Risk Priority Number for the equipment. The strategy of course is to mitigate, i.e. lower the probability of, the failure modes with the highest Risk Priority Number first. The so-called "biggest bang for the buck".
Failure mitigation only works with failure modes, so the tab can only be used for a Risk Analysis or a FMECA and is not supported for a Risk Assessment.
The following important attributes are available on this tab:
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Organization - This field is required but plays no real role for equipment attached to a specific organization since they will always be the same value. It is relevant however for common equipment. You must select an Organization for which the mitigation is applicable. This Organization is used when a mitigation record is activated, and the system adds the equipment to a PM Schedule or Maintenance Pattern. The preventive work order will be created in the selected Organization.
The calculation of the Risk Priority Number for the equipment does not consider the
Organization of the mitigation records.
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Failure Mode - Select the failure mode that you want to mitigate. The same failure mode can be selected multiple times for different mitigation records as required.
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Mitigation Type - System Codes Entity ‘MITP’. This optional field can be used to categorize mitigation records as you see fit. You may consider process control, condition monitoring, process design, equipment modification, etc.
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Mitigated Probability - This is the same field as the Probability field on the RCM tab, but now represents the value after mitigation is applied. The system accepts any value that you select, even if it is worse than the value selected for the failure mode on the RCM tab.
After saving the mitigation record the system will calculate the Risk Priority Number and Risk Level based on the selected Mitigated Probability for this record specifically, giving you immediate feedback on the effect this record will have if activated. Note that the Unmitigated Risk Priority Number and Unmitigated Risk Level of the failure mode as defined on the RCM tab are also present here for easy comparison purposes. -
Mitigated Probability % - This is the same field as the Probability % field on the RCM tab, but now represents the value after mitigation is applied. The system accepts any value that you select, even if it is worse than the value entered for the failure mode on the RCM tab. If the selected failure mode determines the Risk Priority Number for the equipment, this value may appear on the equipment screen.
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Mitigation Applied - This checkbox decides if the mitigation record is active and thus included in the Risk Priority Number calculation of the equipment. If unselected, it is not included. If selected this mitigation record is included in the calculation but, if not the most favorable, may still not decide the Risk Priority Number of the equipment or even that of the failure mode.
Because the same failure mode can be selected multiple times on this tab, and each time a different mitigated probability can be associated, the system will use the mitigation record where the selected probability is associated to the lowest probability rating (most favorable) for the calculation of the Risk Priority Number.
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Mitigation usually requires resources. Time and money. These costs must be estimated manually, but once determined can be recorded in the One-time Mitigation Cost and Recurring Mitigation Cost fields.
The actual mitigation can be based on one single measure or may require a combination of multiple measures and may include preventive maintenance, condition-based maintenance, modifications, etc. Therefor this tab offers several fields to identify these measures and it gives you freedom to combine different measures on one record or create separate records for separate measures as you see fit.
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PM Schedule - Select the PM Schedule that you think will mitigate the failure mode. When you select a PM Schedule, you can also enter the frequency fields for calendar (Perform Every), meter 1 (Meter Interval) and meter 2 (Meter #2 Interval). The system will also show the relationship of the equipment with that PM Schedule in PM State. This field may have the following values:
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Not attached - The equipment is not attached to the selected PM Schedule.
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Multiple attached - The equipment is attached to the PM Schedule more than one time.
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Not active - The equipment is attached but has no due date and no due readings (both 1 and 2) filled in.
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Different frequency - The equipment is attached but the interval data (calendar, meter 1 or meter 2 data) on this mitigation record is different.
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Different meter UOM - The equipment is attached but the meter UOM data (meter 1 or meter 2 data) on this mitigation record is different.
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Mitigated - The equipment is attached and active and no differences were found.
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Maintenance Pattern - Select the Maintenance Pattern that you think will mitigate the failure mode. The system will also show the relationship of the equipment with that Maintenance Pattern in Maintenance Pattern State. This field may have the following values:
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Not attached - The equipment is not attached to the selected Maintenance Pattern.
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Not active - The equipment is attached but has not been activated.
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Mitigated - The equipment is attached and active.
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PM Plan - Select the PM Plan that you think will mitigate the failure mode. The system will also show the relationship of the equipment with that PM Plan in PM Plan State. This field may have the following values:
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Not attached - The equipment is not attached to the selected PM Plan.
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Mitigated - The equipment is attached and active.
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Project - You can reference a project as part of the mitigation. For example, a project may be used to track a modification of the equipment that will help mitigate the failure mode.
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Case - You can reference a case as part of the mitigation. For example, you may want to reference a case that was created for an environmental spill on similar equipment and the work that was executed to mitigate that spill in the future.
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Aspect - You can reference an inspection aspect as part of the mitigation. Use this field if condition-based maintenance is part of the mitigation options.
As a convenience activation of the mitigation can be done using the Activate Mitigation button on this tab. The button does the following for the selected mitigation record when you click it:
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Adds the equipment to the selected PM schedule if not already there and synchronizes the PM interval data.
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Adds the equipment to the selected Maintenance Pattern and activates it for the first sequence.
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Adds the equipment to the selected PM Plan.
The changes to the three different state fields will let you know if the activation was successful.
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