Definition:
Verification, also called Design Verification, ensures that design outputs meet the specified requirements from earlier phases of the functional safety life-cycle. This covers the entire life-cycle (see Figure 7 in IEC 61511).
As you can see in figure 7 below, verification activities (the far right tall box) covers ALL parts of the functional safety life-cycle.
Key Points:
- Verifies compliance with the Safety Requirements Specification (SRS).
- Often involves independent review.
- Distinct from the Functional Safety Assessment (FSA).
- Distinct from validation which is more applicable to startup activities and testing.
Example:
A third-party reviewer checks that the SIS design drawings match the approved SRS before commissioning.
See Also: validation, FSM
Cited Source:
- IEC 61511-1:2016, Clause 3.2.87, Clause 7, and Figure 7
Go deeper: SIL Verification: The Three Gates