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Setting up Safety Integrity Levels

The design team assigns a safety integrity level (SIL) to each safety provision. This numeric value, usually on an ascending scale between 0 and 4, is a measure of the amount of risk inherent in the failure that the provision prevents or mitigates. The provision’s SIL is used in SIF analyses to calculate the impact of a possible failure.

This topic explains how to set up safety integrity levels.

To Set up a Safety Integrity Level

1.	On the site’s Safety Management view, select the Settings tab, and the Safety Management Settings node in the tree.

Tip: You can also select the site’s Administration menu and then Safety Management. The Safety Management Settings dialog appears.

2.	Select the SIL tab. This tab shows any levels that have been defined for the site.

3.	Click New. The Properties window appears.

4.	Provide a name for the SIL.

5.	Assign a numeric value to the level, usually from 0 to 4.

6.	Provide information about the SIL’s use or purpose in the Description box.

7.	Select the Formatting tab to adjust the appearance of SILs listed in configurations and shown in charts.