How to Complete the RCM3™ Worth Doing Section

How to Complete the RCM3™ Worth Doing Section

Worth Doing Tasks

Note: If a Policy Type does not support “Worth Doing” the system will display an error message.

When a maintenance task addresses an operational or economic risk, the task must be "Worth Doing." In this case the cost of doing the task over time must be less than the cost of the impact of the failure including the cost of repair. The table below is used for this calculation:

Worth Doing is broken into three sections: Breakdown costs and Proactive Maintenace that is made up of Pro-Active and Planned Corrective tasks. Each section is broken into costs from loss of production, labor costs and material costs.  These costs are then annualized based on the “Mean Time Between Failures” (MTBF).
Policy Types that support worth doing e.g., OCM and PREV activate the "Worth Doing" tab and require the user to capture the worth doing section of the analysis. 





How to complete the Breakdown Cost calculations:
  1. The analysis summary will already be prepopulated with details captured in the Analysis Detail.
  2. The information details will be prepopulated with information captured in the Information Worksheet.
  3. Click the Breakdown Cost Calculator.
  4. Downtime Cost/Hour - This will be the cost of lost production/operations if the failure occurs, and it results in shutdown of the production/operation.
  5. Downtime (Hours) - This is the total time that production/operations will be down from the point that the failure occurs until production/operations has been fully restored.
  6. Downtime Cost Total - This value is calculated and populated by the system by multiplying Downtime Cost/Hour x Downtime (Hours).
  7. Actual % Production Lost - This value will default to 100% but can be changed by the user. This is the actual % of production /operations that will be lost if the failure occurs. If there is no redundancy in the system, this value will be 100%. In some cases where there is redundancy in the process this value may be 75% or 50% etc.
  8. Labor Cost Per Hour - This is the tariff/charge out rate for the personnel that will be involved in the repair activity for this failure. This figure is normally an average tariff to be used for all trades as decided by the organization.
  9. No of Personnel - This is the number of personnel that will be actively involved in the repair and restoration of production/operations.
  10. Task Duration (Hours) - Not applicable for the calculation of Cost of Breakdown.
  11. Labor Cost Total - This value is calculated and populated by the system by multiplying No of Personnel x Task Duration (Hours).
  12. Part Cost (Including Sec Damage) - This field represents the cost of part replacement to affect the repair for this failure. Where other equipment/parts may also be damaged because of this failure, the cost this need to be taken into consideration and included in this cost. Sometimes this is referred to as “Material Cost.”
  13. Total Cost of Breakdown - This value is calculated and populated by the system and is the sum of Actual Downtime Cost + Labor Cost total + Part Cost (Including Sec Damage).
  14. MTBF - This value represents the estimated average time between failures (in years) for the failure mode under consideration and is used in the calculation of the annualized cost of the failure.
  15. Cost of Proactive Maintenance values used to calculate the total cost of the maintenance task/s defined through the RCM process that will be implemented to either predict or prevent the actual failure from happening unanticipated.




How to complete the Pro-Active Maintenance Cost calculations:
  1. Click the Pro-Active maintenance calculator.
  2. Indicate whether the Maintenace is On-Condition maintenance or Preventative/Time based maintenance using the radio button.



  1. Capture On-Condition Manitenace Costs



  1. Capture the Preventative/Time Based Maintenace Costs.

  1. Planned Corrective Task values required to calculate the financial impact of performing the “Follow On” Planned Corrective task the failure as described in the failure effects.
  2. In the event that the Proactive Maintenance task identified through the RCM process is, for instance, an on-condition task such as vibration analysis, it implies that there will be cost for executing the scheduled vibration analysis task (which is captured in the Cost Of Pro-active Maintenance column), but then the “Follow On” Corrective task will be planned and therefore theoretically result in less or no actual production/process downtime, take less time to perform, and the part cost will normally not include cost caused by secondary damage.
  3. If the Proactive Maintenance task identified through the RCM process is a Scheduled Restoration or Scheduled Discard task, then the cost of the Proactive Maintenance will be 0 (zero) as all the costs will be captured in the Cost of Follow on Planned Corrective Maintenance column.
  4. Cost comparisons are then made by annualizing the costs to calculate the gain or loss.
  5. Capture additional Notes in the Notes Detail section.
  6. Click Save.
Note: You have now completed all the workflow steps for your RCM3™analysis.

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