Why is verification and validation (V&V) critical in rehabilitation devices?

• A. V&V ensures marketing approval from the start.
• B. V&V demonstrates that the device meets design specifications and user needs, ensures safety and effectiveness, and provides evidence for regulatory submissions and post-market surveillance.
• C. V&V is only used for software, not hardware.
• D. V&V replaces clinical trials.

Answer: (B)

Verification and validation focus on proving a rehabilitation device is built right and that it truly meets the users’ needs while remaining safe and effective in real use. Verification asks whether the device was manufactured according to its design specifications—are the parts, controls, materials, and functions correct? Validation asks whether the device actually fulfills its intended purpose for the people who will use it—does it deliver the expected benefits without unacceptable risks in real-world settings? Together, they create the body of evidence regulators require and support ongoing safety monitoring after the device is on the market.

This matters because rehabilitation devices interact closely with users who may have complex needs and vulnerabilities. Demonstrating both that the device is designed and produced correctly and that it works as intended in real life helps ensure safety, performance, and user satisfaction. V&V also provides the data regulators look for to grant approvals or clearances and to guide post-market surveillance, updates, and risk management.

It's not about marketing approval at the start, and V&V covers hardware as well as software. It does not replace clinical trials, which may still be needed to establish safety and efficacy for certain indications or populations.