When you start exploring new ideas, you are usually in a space of maximum uncertainty. You don’t know if your ideas will work. Refining them in a business plan won’t make them more likely to succeed. You are better off testing your ideas with cheap experiments to learn and systematically reduce uncertainty. Then increase spending on experiments, prototypes, and pilots with growing certainty. Test all aspects of your Value Proposition and Business Model Canvases, all the way from customers to partners (e.g., channel partners).