Some questions keep popping up about validation and I thought I'd try to clarify it a bit. What is Validation I've never seen a good definition for what validation in IS is supposed to be or what it's supposed to do anywhere. There is a lot of discussion about what components do when validating, but before launching into a discussion about it, I thought it would be helpful to give a little history and explain a little of the philosophy behind validation. This will likely be better than a straight definition because, hopefully, you'll understand the evolution a... [More]