When should you write the introduction and overview portion of your business plan?

Typically, a business plan would follow the same format as a thesis or a research paper. You will start with the introduction, the body, and the conclusion, then fill them up with subheadings. So the introduction and overview portion of your business plan will be written before anything else. The introduction or overview of a business plan is usually the industry overview or the background. This will give an idea first of the industry that you want to enter and how your business fits in.