The "business case roadmap" (The bcr) collection presents a step-by-step procedure to find possible paths for the establishment of a business. For the construction of this tool, we base on best practices observed throughout years of experience in conducting business and lecturing. The collection includes three books that complement each other, which are useful at different stages of a business life. For a global approach to business development, we will present three volumes for this collection. In the first one we will explain how to evolve from the Idea to the Business Case; in the second, we will explain the go-to-market and how to navigate the implementation stage; in the third, we will focus on how to expand the business, avoid common mistakes inherent in this stage; and we will also emphasize the financial backup required for the expansion of the operation. Vol I: How to evolve from the idea to the Business Case