A business plan is a statement of goals for a company in any field. Essentially, it is a set of guidelines relating to how you will run your business. A thorough business plan outline should start with an executive summary, followed by an overview of the company and some facts about the products or services you sell. It should also include any marketing strategies, as well as basic facts about the team managing the business. Most business plans also feature a financial section toward the end, detailing income, expenses, and a breakeven analysis. There is no required length for this type of document, but 20 pages is about average.