Yours truly was interviewed for this article:
“V&V” is one of those topics that should be simple to understand, but for some reason is the source of a lot of confusion. This is evident in the comments on Software Verification vs. Validation.
It is also interesting to note that the differing interpretations of these definitions results in a wide variety of V&V strategies and plans. From a regulatory point of view there is no single right or wrong way to do it. It’s similar to the implementation of quality systems in general. If you say you are going to do something you need to be able to prove that you’re actually doing it.