Comparing SIL Verification vs SIL Certification

The table below compares Simple SIL Verification vs SIL Verification vs SIL Certification. Risknowlogy can offer its customers all three options depending on their needs. It is important though to understand that only SIL Certification guarantees full compliance with the functional safety standards.

Comparison Table

The table below lists all the tasks that can be performed in relation to SIL. Depending on the option chosen the task can be not included (), optional, or mandatory ()

Task Description Simple SIL Verification SIL Verification SIL Certification
1 Functional Safety Management Optional
2 Verification SRS
3 Verification Hardware and Embedded Software Optional
4 (Verification) reliability calculation (PFD)
5 Verification application logic Optional
6 Verification Basic Safety Optional Optional
7 Verification User Documentation Optional Optional
8 Verification and Witness FAT, iFAT, and/or SAT Optional Optional
9 SIL Verification Summary Report * Not applicable
10 SIL Certificate + Summary Report Optional **
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* When performing SIL Verification the resulting SIL Verification report will document what has been verified and what is the conclusion. The conclusion could be that the requirements for that particular task are SIL compliant or that there are gaps identified during the SIL verification process.

** When performing SIL Certification the resulting report can only come to the conclusion that everything is SIL compliant. It is not possible to issue a SIL certificate when there are still gaps. In other words, the project is not finished unless all gaps are closed and everything is SIL compliant. A SIL Certification report is the best option for end-users who want to make sure that they get a fully SIL compliant solution.