Verification and validation process covers all phases of product development and different many technologies. I think it is extremely important to consider this process early in the design stage when developing the requirement specifications for the product or the medical device. Another advantage of starting the verification and validation process early is reducing the cost if previously tested materials or coatings were used for the product. Clarity, conciseness, measurability, appropriate tolerances, accuracy, and testability can all impact the final design and overall manufacturability. (1) These specifications also provide the acceptance criteria for validation and verification activities.

(1) https://www.asme.org/engineering-topics/articles/manufacturing-design/validation-verification-for-medical-devices