	Related Topics:
	Models

Universal Reliability Definitions (URDs)

Universal reliability definitions (URDs) are used in Xfmea to represent a set of properties that can be applied to items in the System panel and to functions, failures and causes in the Analysis Panel. These properties can include failure behavior and maintenance tasks. URDs are resources that are available for use throughout the project and can be managed via the Resource Manager.

The Universal Reliability Definition window allows you to create, view and edit URDs. It can be accessed by clicking the Create New or View/Edit icon in the wizard available from the URD field in the FMEA hierarchy.

It can also be accessed from the URDs page of the Resource Manager by choosing Main > Resource > New, by selecting a URD and choosing Main > Resource > View or by double-clicking a URD.

At the top of the window, you can specify the URD name. By default, URDs are named "URD [increment]" (i.e., the first URD created is URD 1, the next is URD 2 and so on). You can replace this with your own name of up to 150 characters, if desired. Users with the "Manage other repository settings" permission can specify how these default names are created in the current database via the Define Default Name Formats window, which is accessed by choosing File > Manage Repository > Define Default Names.

Note: Two views are available for the URD Properties area. The Hierarchy tab displays information about the URD in a standard hierarchical format. Each resource directly assigned to the URD is shown, along with a subset of its properties. This view allows you to specify properties. The Filtered tab displays all resources of a specified type that are associated with the URD, either by being assigned to it directly or by being assigned to a resource that is assigned to the URD. You cannot change which resources are assigned on this tab. For more information, see the Properties Windows topic.

The table contains the following settings to configure the URD:

Model allows you to choose or create a model to describe the behavior associated with the URD. This can be a reliability model, a probability of failure model or an event occurrence model; once you have specified the model, its category will be displayed as part of the field name.
Identifiers allows you to enter additional identifying information that can be used to search for this resource.

Information about the creation and last modification of the URD is displayed at the bottom of the window.