They cover the full spectrum of the business from production of the good or service to it marketing and even the financing of the firm. The Business Plan will include a pro forma financial statements which are projections. It will include your target market, the costs involved in meeting customers' needs, a background of the management, and potential problems. Making a business plan is generally not well liked by entrepreneurs. Well liked or not, it has to be done.
Business plans serve as a road map for the future.
As such, many problems can be foreseen and hopefully avoided. The business current market conditions facing the company including opportunities, threats, competition. The management team in place and their experience. Pro Forma financial statements. This is often the most difficult step and many assumptions must be made.