Additional Civil Methodology Details

Find below additional details for Step 1 and Step 2 of the Civil RBI Methodology. Components and Sub-Components and Asset Functional Failure Analysis of a sub-Component or part of the asset is practical when the asset is made of different mate...

Find below additional details for Step 2 of the Civil RBI Methodology. When failure occurs shortly after the asset has been brought (back) in operation, it is called an “infant mortality”. When this happens, it is sometimes said that the equipmen...

Find below additional details for Step 2 of the Civil RBI Methodology. Abuse of the asset (i.e. purposely using the asset outside its design conditions) can be characterized as a Non-Age-Related Failure Mode. Just like an accidental or environmen...

Find below additional details for Step 2 of the Civil RBI Methodology. Civil studies should focus only on credible effects and disregard unlikely effects such as worst cases and progressive effects. Example: Effects      Urg...

Find below additional details for Step 4 of the Civil RBI Methodology. Example 1: Asset in Good Condition The study is conducted in 2007 The last inspection was conducted in 2004 During the inspection it was found that asset is i...

Find below additional details for Step 5 of the Civil RBI Methodology. The susceptibility rating is indicated in the susceptibility class table below. Susceptibility ratings: Throughout the lifetime of the asset the conditions of its enviro...

Find below additional details for Step 5 of the Civil RBI Methodology. Local historical records about the behavior of assets will provide the most valuable information. Influence factors that determine the susceptibility to degradation are: ...

Find below additional details for Step 5 and Step 7 of the Civil RBI Methodology. If the Consequence is due to the occurrence of an assets design condition, and the design condition remains credible, the Consequence Likelihood should be equal...

Find below additional details for Step 6 of the Civil RBI Methodology. The health & safety and environmental consequences are monetarized using the logarithmic average of the corresponding economic consequence class to determine a representat...

Find below additional details for Step 7 of the Civil RBI Methodology. The Criticality class of a Component (or asset) can also be used as a guideline to determine the type, extent and/or frequency of inspection and/or maintenance tasks for thi...

Find below additional details for Step 7 of the Civil RBI Methodology. Age-Related Failures The time-dependency of likelihood can be used to define a profile of the future risks. This is obviously only applicable for age-related failures. T...

Find below additional details for Step 8 of the Civil RBI Methodology. The key question here is: “How well can we predict the future?” To put it in other words: “Do we have sufficient historical data and information about future changes to pre...

Find below additional details for Step 9 of the Civil RBI Methodology. The interval factor allows a safety margin between the maintenance or inspection tasks to allow for uncertainty in the prediction of useful or remnant asset life. Overstatin...

Find below additional details for Step 10 of the Civil RBI Methodology. Generic maintenance tasks as function of Degradation Mechanism type: Each category describes a preventive task, except for the Corrective Replacement which is the Base...

Find below additional details for Step 11 of the Civil RBI Methodology. Enhanced Cost Profile The cost profile created in Step 5 (Consequence of failure) does not include financial parameters such as the discount rate and inflation, alth...

Find below additional details for Step 12 of the Civil RBI Methodology. ALARP, “As low a risk as possible”, may require that maintenance tasks be implemented to reduce the degradation rate of the asset and hence the likelihood. A reduction in the...