ITEM TOOLKIT

Chapter 7 RBD 165
2. Select the failure model from the name drop-down list (A). If the desired model does not appear in the list, click New
Model to define the failure model (B).
3. Select the model type from Type combo box (C). Available model types include:
Fixed, Rate, MTTF, Dormant, Standby, Weibull, LogNormal, Normal, Gamma, Beta, BiNomial, ChiSquared,
Poisson, Uniform and LogUniform.
4. When the type is selected, the mathematical model can be displayed by clicking on the help icon (D).
5. Enter the remaining block information and parameters as necessary (E), and Time Phase tab data (G).
6. When you are finished entering block parameters, click OK to save the changes and close the dialog box (F).
To edit Nodes parameters:
1. In the RBD tab, right click the desired node and select Node Parameters from the pop-up menu. The Node
Parameters dialog box appears.
2. Edit the node parameters as necessary. Nodes to the right of a parallel arrangement may be given a vote number (H)
to indicate how many success paths must be available through the parallel arrangement (if a vote number is not
specified only one path is available).
3. When you are finished entering node parameters, click OK (I) to save the changes and close the dialog box.
Constructing Sub-Systems
To construct a sub-system:
1. In the RBD tab, click the block for which you want to create a sub-system.
2. On the RBD toolbar, click the Page Down icon (A). An empty RBD diagram appears.
3. Add the nodes, blocks, and connections for the sub-system (B).
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I