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Create a Common Cause Failure

This topic describes how to create a Common Cause Failure, and link it to the related Instrumented Functions. You can link a Common Cause Failure to as many Instrumented Functions as needed.

Before You Begin

• Create an Instrumented Function.

Steps

1. Access the Instrumented Function for which you want to create a Common Cause Failure.

2. In the workspace, select the SIL Assessment tab, and then select Common Cause Failures.

   The Common Cause Failures subsection appears, displaying a list of Common Cause Failures for the Instrumented Function.

   

3. In the upper-right corner of the section, select , and then select Create New.

   A blank datasheet for the Common Cause Failure appears.

   

4. As needed, enter values in available fields.

5. In the lower-right corner of the datasheet, select Save.

   The Common Cause Failure and the Instrument Function are listed in the workspace. A message appears, prompting you to link the Common Cause Failure to another Instrumented Function.

6. In the Related Instrumented Function section, select .

   The Search window appears.

   

7. In the upper-right corner of the window, select .

   A list of Instrumented Functions appears.

   

8. Select the Instrumented Function that you want to link to the Common Cause Failure, and then select OK.

   The Common Cause Failure is linked to the two Instrumented Functions listed in theRelated Instrumented Function section.

Results

• The Common Cause Failure is listed in the Common Cause Failures section for all the Instrumented Functions that you have linked.

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