I've read through the getting started article and read the article on Hardware Mocking but what I see is just an arbitrarily modified VI being embedded in another VI which does simple comparison testing. Is that what VI Tester does? Could I see a more "real world" example of how and, perhaps more to the point, why I would do this? As a rule, I test a VI when I construct it. This seems overly formalized for most cases. Why would I want to retest a working VI later?