Creating a Fault Tree Analysis Diagram

To create a Fault Tree Analysis Diagram

  1. In the Containment Tree, find the required package and select Create Diagram.



  2. Do one of the following:
    • In the dialog, expand Safety and Reliability Analysis and select Fault Tree Analysis Diagram.



    • In the search tab, type the keyword "fault" and then select Fault Tree Analysis Diagram.

Adding a Fault Tree Event in the Fault Tree Analysis Diagram

To add a Fault Tree Event in the Fault Tree Analysis Diagram

  • From the Fault Tree Event pane, drag and drop any event in the diagram pane of the modeling tool.

You can import a complete Fault Tree Analysis Diagram with the help of the Transfer In event.

Adding a Fault Tree Gate in the Fault Tree Analysis Diagram

To add a Fault Tree Gate in the Fault Tree Analysis Diagram

  • From the Fault Tree Gate pane, drag and drop any gate in the diagram pane of the modeling tool.

Adding probability to the Fault Tree Event

To add probability to the Fault Tree Event

  1. From the Fault Tree Properties pane, drag and drop Define Basic Event Probability in any Fault Tree Event.



  2. Double-click the probability to open the Specification of Value Property probability window and enter the probability value in the Default Value tab. 

    The probability value will be displayed in the Fault Tree Analysis Diagram.



    The probability value of the Basic events will be used to calculate the probabilities of the Intermediate and Top events.

Calculating the probability of the Intermediate and Top Event

To calculate the probability of the Intermediate and Top Event

  • Click the Run button in the diagram toolbar to run the simulation. The probabilities for the Intermediate and Top Events will be calculated automatically.


Interconnecting the Fault Tree Analysis diagram with the System Model

To Interconnect the Fault Tree Analysis diagram with the System Model

  • Use the dependency matrices to establish a connection between the Fault Tree Analysis diagram and the System Model. All created events should be connected with the system model using the Relevant To relationship.

Reference