To my knowledge, visiontyping was first introduced to the public after a Silicon Valley Product Group session, and can be read about in a blog post by Marty Cagan from 2009. Marty was using visiontyping at eBay. I may be wrong, but that's where I was first exposed to it. It was presented after a long discussion of the good and bad effects of executives who are deeply involved in the product management process. You can refer to his blog posting for background. For me, one of the main tenants in ...