When I lived in Seattle, a friend bought a boat. He described it as 'a hole in the water that you throw money into.' In the Product world, that's a pretty accurate description of Discovery - you never know how long it's going to take or what you're going to get out of it. Even worse, we use the word Discovery to mean a lot of things - yet most of the time, we don't discover anything new. Other people (current or potential customers) already know this stuff, we're simply hoping to learn.