What should come into your business plan is how you assess it, how you foresee anything occurring that could have an adverse impact and how you would deal with it in the right ways. If you are looking to obtain funding from a bank or people you know, it is essential to show what the risk factors are in the proposed business and how you plan to defend against them.
A successful project report must achieve the following objectives: Be appropriately arranged, with an executive summery, a table of contents and its chapters in correct order ; Be the right length and have the right appearance ; Give a sense of what you and your company expect to accomplish ; Explain in quantitative and qualitative terms, the benefits to the user of your company products and services ; Present hard evidence of the marketability of the products and services.
The first point to keep in mind about business plans is... have a business plan! This may seem obvious but is overlooked. Many people start businesses without a plan; sometimes it can come from sheer bravado, thinking "I don't need a plan", or alternatively you might hear "It's all inside my head, that's my business plan".
A business that makes sense and is going to be sustainable in the future is one that has that clear vision within which all the smaller parts contribute to make it successful.