Of course, it is worth it to take the time to think carefully through your assumptions, and ensure you at least have hypotheses around how you will create value. But use the analysis as a way to focus attention on the most critical assumptions, rather than spend a ton of time massaging the numbers.
Scott D. AnthonyHistory teaches us that many breakthroughs were happy accidents. Whether that's penicillin coming from Fleming neglecting to clean his laboratory before going on vacation or the team at Odeon trying a little side project that allowed people to communicate in real time as long as their message was 140 characters or less (which ultimately of course became Twitter), the unintended is often the transformational.
Scott D. AnthonyPeople will try to copy what they can see, which is the final product or service, but it's much harder to see (and copy) all the intricacies of the business model that allows you to create, capture, and deliver value. And that's what you need to get right to really jam something down people's throats!
Scott D. Anthony