How can we increase opportunities for businesses to succeed in the market and build a company that continuously makes profit? This book will reveal that a business model without customer validation is only a series of hypotheses that have not been tested. Successful startup owners are good at combining smart projects and customer development. They seek to establish, test, and find business models in a continuous process. As a result, they can make the transition from the “unknown” to the “known” and for that matter, from the “uncertain” to the “certain."