About Integration Between SIS Management and LOPA

Integration between SIS Management and LOPA helps in assessing the SIL level for Instrumented Functions.

To assess the SIL level for an Instrumented Function using LOPA:

Perform a LOPA for the risk that the instrumented function is designed to mitigate. A LOPA record will be created.
Approve the LOPA by changing the state of the LOPA to Complete.

In the SIL Assessment section of the Instrumented Function, link the LOPA in the LOPA Assessment datasheet. A LOPA Assessment record is created by mapping the following values from the LOPA record that you linked.

This field in LOPA Assessment:	...is populated with the value in this field from LOPA:
Linked LOPA ID	LOPA ID
Frequency of Initiating Event	Frequency of Initiating Event
Mitigated Consequence Frequency	Mitigated Consequence Frequency
Required Mitigated Consequence Frequency	Required Mitigated Consequence Frequency
Required Probability of Failure	Required PIF PFD
Risk Reduction Factor (RRF)	Required PIF Risk Reduction Factor
Unmitigated Consequence Frequency	Unmitigated Consequence Frequency
Total IPL PFD	Total IPL PFD
Selected SIL Level	Calculated SIL

If the LOPA is associated with a Risk Assessment, then a copy of the Risk Assessment is created and linked with the LOPA Assessment.

You can then associate the LOPA Assessment with an Instrumented Function. GE Digital APM system populates the following values in the SIL Assessment section of the Instrumented Function based on the values in the LOPA Assessment:

This field in Instrumented Function:	...is populated with the value in this field from LOPA Assessment:
Selected SIL Level	Selected SIL Level
Required Probability of Failure	Required Probability of Failure
Risk Reduction Factor	Risk Reduction Factor (RRF)

The Instrumented Function is linked to the Risk Assessment associated with the LOPA Assessment.

Illustration

The following image illustrates the data mapping between LOPA and LOPA Assessment.

Data Mapping Between LOPA And SIS Management