Provide a Roadmap _ A business plan provides a guideline to help you achieve your goals. Mapping out a plan helps you in determining which strategic path you will use to reach your desired destination. The research and brainstorming conducted during the writing of the plan will assist you in figuring out where the business should go while providing a complete set of instructions to help you get there. The primary goal of a business plan is to provide a roadmap that ensures your business is heading in the right direction and stays on course.
Another consideration. Should the business plan be a document that is focused on selling an idea for a product or service? For many years I worked in a company that did not want anything in a business plan that could be construed as showing a bias towards or against a project. The mantra was to only present facts in the business plan. The Operations Research Department was there to review the analysis as being unbiased. To handle the "what if" scenarios or sensitivity analysis we prepared a supplemental analysis documents which were mostly financial oriented. Personally, I like a factual approach and use the presentation of the final document to point out the conservative aspects of the content.