What is a “Functional Safety Verification”?
IEC61511-1:2016, 3.2.27 – confirmation by examination and provision of objective evidence that the requirements have been fulfilled.
Verification achieved by demonstrating for each phase of the relevant SIS safety lifecycle by analysis and/or tests, that, for specific inputs, the outputs meet in all respects the objectives and requirements set for the specific phase.
Verification is simply the process of confirming that something (anything at all) has been produced correctly. Within the safety lifecycle, verification is a functional safety management activity which should be carried out at every stage to ensure systematic integrity. It is part of the normal engineering quality process carried out through checking, review, inspection or testing.
Verification records could include check prints, completed checklists or inspection and test records. Validation in comparison to verification is a specific lifecycle phase which takes a wider view because it looks at the overall completed system. Validation always relies on verification techniques as a way of showing the system meets all of the specified requirements in every regard. It should be noted that the validation process must also be verified.
Verification is at a lower level and relates to individual components or documents. Verification never relies on validation. FSA looks for evidence that verification has been completed effectively.
