As for Design Verification, I believe that a necessary practice is to let experts from a different discipline test the product under unusual circumstances. I think that there are circumstances that the product might be used under. While Verification is meant to ensure a product meets the operational needs of the user, it can also be widened to include unexpected conditions. Today, with the help of computerized simulations, experts can conduct a verification process with almost any testing conditions. However, this should only be a secondary process, not a main process in the verification experiment as most of the time users would use the product under normal conditions. Moreover, one must consider whether they need Validation or Verification. As “verification is proof that you designed the product correctly. Do your outputs meet your inputs? Have your inputs been written well and have you recorded sufficient outputs? The overall question is “did I design this device correctly? While Validation is subtly different. The overriding question is “did I design the right device?”(Ref. mddionline website). Also, an important question is what stage of verification or validation one might need? Prospective, Retrospective, Full-scale, Partial or Cross-validation/verification.