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Assess the Mitigated Risk

This topic describes how to perform a mitigated risk assessment for an Instrumented Function in an SIL Analysis.

Before You Begin

• Assess the SIL value of the Instrumented Function using one of the following SIL Assessments:
  • LOPA Assessment
  • Risk Matrix Internal Assessment
  • PHA Internal Assessment
• Associate the SIL Assessment with the Instrumented Function. The Risk Assessment associated with the SIL Assessment will be linked to the Instrumented Function.
• Create a Recommendation for the Instrumented Function.

Steps

1. Access the Recommendation that is associated with the Instrumented Function for which you want to assess the mitigated risk.

2. Select the Mitigated Risk tab.

   The Mitigated Risk section appears, displaying the overall risk rank and the risk ranks for each risk category.

   

3. Select the section that displays the risk rank.

   The Mitigated Risk Assessment window appears. The window contains a tab for each risk category configured for the Risk Matrix, which you can select to access the Risk Matrix for the category. By default, the icon appears in the cell in which the icon appears.

   Note: You cannot modify the unmitigated risk assessment in the Risk Matrix.

   

4. Select the tab corresponding to the category for which you want to assess the mitigated risk. For example, if you want to assess the mitigated risk for the Environment category, select Environment.

   The Risk Matrix for the selected category appears.

5. On the matrix, select the cell whose value represents the mitigated risk for the selected category.

   In the cell that you selected, the icon appears.

   

6. For each category for which you want to assess the mitigated risk, repeat steps 4 and 5.

7. In the lower-right corner of the Mitigated Risk Assessment window, select Save.

   The mitigated risk for the Instrumented Function is assessed. The Mitigated Risk section appears, displaying the overall mitigated risk rank and risk ranks for individual categories. Depending on the configuration of the Risk Matrix, the overall risk rank can be the highest or the sum of all the ranks for all the categories.

   

   Note: See the Overview of the Risk Matrix section of the documentation for additional options when working with the Risk Matrix.

Results

• A Risk Assessment record that stores the details of the mitigated risk is created and linked with the Instrumented Function.

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