Related Topics:

Failure Modes and Reliability Analysis

Batch Update Reliability Policies

Setting the Reliability Policies

The reliability policy determines the reliability/maintainability characteristics for the records in an FMRA.

To view or set the reliability policy in Xfmea/RCM++/RBI, select the record in the system hierarchy or FMRA and go to the Reliability Policy heading in the Properties tab. (Note that the following picture includes the maintainability characteristics that can be defined in RCM++ or RBI. In Xfmea, only the reliability model will be displayed.)

In BlockSim, right-click the record in the FMRA and choose Inherit or Define at This Level. If a record is set to define at this level, you can use the Block Properties window to view or edit the universal reliability definition (URD).

When creating or assigning URDs to records in an FMRA, note that:

Tip: In Xfmea/RCM++/RBI only, you can use the Batch Update Reliability Policy window to change the policy types of multiple records all at once. Choose FMRA > RAM Analysis > Policy Update.

Basic Reliability Policy Types

Two basic reliability policy types are available for all FMRA records in both Xfmea/RCM++/RBI and BlockSim:

Tip: If you use this option with a record that has dependents, the software will hide those dependents in the FMRA because they will be irrelevant to the FMRA’s calculations.

Only in Xfmea, RCM++ or RBI

In Xfmea, RCM++ and RBI only, you also have the option to set the reliability policies based on the occurrence ratings from risk priority number (RPN) calculations or the failure probability ratings from criticality analysis. (See Using Rating Scales to Set the Reliability Policy.)

When selected, a read-only probability of failure model (i.e., the probability that the cause or failure mode will occur) will be automatically assigned to the record based on the rating assigned in the FMEA.

In RBI only, you can use the model generated in the risk based inspection analysis results:

 

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