You can add a classification to a cause of failure. If you do so, the classification is shown in the corresponding column of the form sheet.
Whether the column for classification is shown or not depends on the type of form sheet.
Adding a classification:
Right-click on a function or malfunction.
Select the classification or click on Select… - Outcome: the "Properties for Malfunction" dialog will open.
Choose one of the following: NC: Not classified, S: Safety compliant, CC: Critical characteristic, PC: Potential critical characteristic, SC: Significant characteristic, PSC: Potential significant characteristic.
Click OK.
Outcome: a classification has been added.