What is the role of independent verification in safety-related hardware protection?

• A. Verification by an independent process or party to confirm changes or software integrity.
• B. Self-check by the same team.
• C. Only required during license renewal.
• D. Not required.

Answer: (A)

Independent verification provides an objective assessment of any changes to safety-related hardware or software, ensuring the protective functions remain correct and reliable. Because safety systems must respond correctly under fault conditions, changes should be reviewed and tested by someone outside the development or maintenance team. This separation helps detect errors or omissions that the original team might miss and provides documented evidence that requirements, design intent, and testing are properly satisfied. It also supports regulatory and safety-justification needs by showing that modification processes, configuration management, and validation activities were carried out thoroughly. This isn’t just a self-check or something only done at license renewal; it’s applied whenever meaningful changes are made to maintain confidence in the protection system.