Delete a Safeguard

Note: You can delete a Safeguard only if the associated LOPA is in the Planning state. Additionally, if you have linked the LOPA to a Consequence in Hazards Analysis, you can delete the Safeguard only if the Hazards Analysis is also in the Planning state.

Steps

Access the Layer of Protection Analysis that is associated with the Safeguard that you want to delete.
In the left pane, select Safeguards and IPLs.

The Safeguards and IPLs workspace appears, displaying a list of Safeguards linked to the LOPA.
Select the row containing the Safeguard that you want to delete.
In the upper-right corner of the Safeguards and IPLs workspace, select .

The Delete IPL/Safeguard dialog box appears, asking you to confirm that you want to delete the safeguard or IPL.
Select OK.

The Safeguard is deleted.

Results

If the deleted Safeguard was an IPL, then the Total IPL PFD field on the LOPA datasheet is updated with the recalculated PFD value to remove the effect of the deleted Safeguard.
If you have linked the LOPA to a Consequence in Hazards Analysis, the Safeguard that you deleted in the LOPA is also removed from the Hazards Worksheet of the Hazards Analysis.