This is utter nonsense for so many reasons.<p>Startups are valuable when they make money, and they don't make money because of the idea. They're all about the people: the founders and their relationships to the target market.<p>That's not to mention how often ideas change. Sometimes the target market changes completely as well.<p>You can make detailed, elaborate models all you want, but it's not going to tell you anything about the value of a startup. It's the belief that ideas are important that lead so many first-time founders to fail.