Associating PRAs with a System

You can analyze a system by associating one or more PRAs with it.

In the following scenarios, the system corresponds to a logical system and a PRA is associated with a logical component. The behavior is the same if the PRA is associated with a function (Occurrence-Occurrence) located in the Structure Tree.

This task shows you how to:

See Also
Editing a Causality Relationship
Edit Section

Create a PRA Table

You can create a PRA table, which is linked to an element of the Structure Tree. It is possible to associate several tables to a structure element.

  1. Expand the Structure Tree and select the node corresponding to the instance of the system under analysis.

    Note: You can create a PRA, if no Failure Modes and Effects Analysis (FMEA) is already associated with the node.

  2. From the Edit section of the action bar, click Create Analysis .

    If at least two templates are available on the server, the Choose Analysis's Template dialog box appears.

  3. Optional: From the Choose Analysis's Template dialog box, select the template to be applied.

If a template can be selected, this template is applied to the created table, otherwise the default template is applied.

Tip: You can rename the created table by selecting the node in the Structure Tree, pressing F2, and editing the title.

A child node representing the PRA is created under the instance in the Structure Tree.

You can now load the created table to populate it.

Load a PRA Table

You can load a table to populate it or to visualize its content.

Note: If the table is associated with a revised system, a few more actions can be done. For more information, see Loading a PRA on a Revised System.

  1. From the Structure Tree, select the node representing the PRA.
  2. From the Edit section of the action bar, click Load/Unload Analysis .

    The PRA table appears in the work area with its causality relationships, if it contains causality relationships.

    You can now:

    • Create causality relationships by using Create Causality Relationship , from the Edit section of the action bar.
    • Edit causality relationships.

      For more information, see Editing a Causality Relationship.