To write the business plan, you need to be aware of the business concept and be able to provide an overview of how it will be implemented. It is also one of the most important documents for obtaining grants and loans.
The business plan forces you to deal with the business idea and its implementation. It also serves as a controlling tool once you have completed your start-up project.
As this document fulfills both external and internal functions, it is essential to deal with it in detail and to design it thoroughly.