Related Topics:

Failure Modes and Reliability Analysis (FMRA)

Universal Reliability Definitions (URDs)

Setting Reliability Policies

Before you can perform any calculations with the FMRA, you must choose a reliability policy type for each record in the hierarchy. If you choose the "Inherit" policy type, the record's reliability and maintainability will depend on the record's dependents. If you choose any other policy type, the record's reliability and maintainability will depend on the URD that is assigned to it. See Performing Calculations with the FMRA.

Note: The information in this topic assumes that you understand how to configure URDs and use them to define reliability/maintainability characteristics within Synthesis-enabled applications. If you are not familiar with this concept, see Universal Reliability Definitions (URDs).

Choosing a Type of Reliability Policy

The reliability policy type determines how a record's reliability/maintainability characteristics will be defined. When you click a record in the FMRA, the Properties tab will allow you to set the reliability policy.

The following policy types may be available under the Reliability Policy heading:

Note: If you use this option with a record that has dependents, the software will hide those dependents. This is because they will be irrelevant to calculations that you perform with the FMRA.

If you calculate the reliability characteristics using RCM++, the software will assume a reliability-wise series configuration (i.e., it will assume that the occurrence of any cause, or the failure of any sub-item, is sufficient for the entire system to fail). If you have BlockSim 8 installed on your computer, you can also synchronize the FMRA hierarchy with RBDs in BlockSim to arrange the records in a more complex reliability-wise configuration. See Calculation Options Window.

To change the policy types of multiple records at once, choose FMRA > Tools > Batch Modify to open the Reliability Policy Update window.

Assigning a Universal Reliability Definition

When Define at this level is selected as the policy type, you will have the option to assign a universal reliability definition (URD) to the selected record. The URD can include a probability model in addition to corrective and scheduled tasks, when applicable.

When creating a new model for a record, please note the following:

To edit a record's URD, select the record and then, on the Properties tab, double-click the URD, Model or Corrective Task field to open the associated resource wizard.

You can add scheduled maintenance tasks to an item or cause via the URD resource wizard. For each scheduled task you add via the wizard, a Scheduled Task field will appear on the Properties tab, as shown next.

 

© 1992-2013. ReliaSoft Corporation. ALL RIGHTS RESERVED.