If you are seeking finance for your business, you will need to show banks and investors why they should invest in your business. Lenders and investors will only risk their time and money if they are confident that your business will be successful and profitable.
Set yourself a reminder to review your business plan regularly. If you have a team in your business, holding brainstorming sessions is a good way to benefit from their knowledge - it ensures you are all on the same page and that you get their support.
Even though the summary will be read first, it is easiest to write it last – providing an overview of the complete business plan. The aim is to draw the reader in, so what you include will depend on your audience. If you are seeking funding you need to really sell your business idea in the summary.
A business plan is a formal statement of business goals, reasons they are attainable, and plans for reaching them. It may also contain background information about the organization or team attempting to reach those goals.