A concept plan is a brief description of a new business venture. A concept plan can be used to expand on a preliminary business idea, guide more detailed planning, and communicate critical information. By organising and documenting the founders' intentions, the concept plan signals a commitment to a diligent planning effort. A concept plan ensures that everyone on the design team is looking at the same sketch of a dream to ensure the success of this project. Budgeting, Budgeting, Budgeting: At the end of the day, every project is based on numbers. The concept plan should be brief, no more than a few pages long. Writing a concept plan entails much more than just jotting down notes and ideas.