Approving the SIF Design

When all is verified (Achieved PFD checked, Performance checked, and Response Time checked) then you can Approve your design in the Approval area.

Approval Prerequisites

The following Approval rules apply:

Unrated SIFs

Approval is allowed when Assessment Status is OK.

SIL A rated SIFs

If there is no Subsystem, Approval is allowed. Design Status (DS) show “A”. (Greenfield project)
If design is completed (Design Status (DS) shows green), Approval is allowed. (Brownfield project)

SIL ≥ 1 rated SIFs

If design is completed (Design Status (DS) shows green), Approval is allowed.

Approving the SIF Analysis

When all is good, you can Approve the SIF Analysis.

Click the Approve button to open the Approval Pane.

Review any Warning shown.
Select the Approval Level (if applicable).
Click Approve.

Graphical user interface, text, application Description automatically generated — Click Approve to Approve your design.

When you Approve the design the Review Status (RS) will update. This is shown on the Analysis Main Screen, as well as on the Icon Description automatically generated General Tab.

Creating a new Version

When already Approved, you can create a new Draft version. To do so click Edit Final Approved Analysis.

To create a new Draft version, click Edit Final Approved Analysis.

Remember you can find all versions in the Revision History tab.

Roll Back

It is possible to “roll back” to your last Approved version of the SIF Analysis. When you click Roll Back, all changes made after the Approval will be discarded.

Roll Back blockers

Roll back is restricted when certain actions have been performed that impact the SIF Analysis and return it to Draft status, as outlined in the below table.

Connected Object	From where	What action
Equipment-Actor	Equipment Details Page	Changing the Equipment Name
		Changing Dangerous Failure Rate Lower or Upper range
		Adding or deleting a Test from the Schedule Test section
		Making any change to the FMEA table in the FMEA section
		Changing the Fault Tolerance Modifiers in the Implementation section
		Changing the Inherent Fault Tolerance parameter in the Implementation section
		Changing the Inherent ETT parameter in the Implementation section
		Changing the Inherent Actor in the Implementation section
		Changing the Mean Time To Restore setting in the Repair section
		Changing the On Stream Repair Possible setting in the Repair section
		Changing the Response Time setting in the Repair section
		Changing the Accuracy setting in the Repair section
Function Group	Settings (changed directly by users with admin rights)	Changing the Function Group from the Function Group settings
Subsystem	Settings (changed directly by users with admin rights or updated through a changed and then final approved SIF Analysis)	Changing the Subsystem from the Subsystem settings
LOPA	LOPA Details Page	Not having connected LOPA in Final Approved state
		Adding new connected LOPA to DRAFT SIF
		Deleting connected LOPA from DRAFT SIF (Note: Rollback can only be enabled when LOPAs connected to the DRAFT SIF version are the same as LOPAs connected to the LAST FINAL APPROVED SIF version, no LOPA connected to the SIF should have been added, deleted, or sent to draft)