Finally, a business plan should be error - free. This is important because your business plan defines who you are as a business person. If it turned out sloppy, then that does not speak too highly of you.
In essence, here is a great way to think of superior business planning. Imagine you are taking a road trip from California to New York. No planning ("flying by the seat of your pants") would involve you getting in the car and driving "East" on every freeway you come across. Adequate planning would involve mapping out your course, planning where to stay overnight, where to eat, sights to see, and so forth.
Include a personal background. There are many good reasons to start a catering business and you should let readers know why you are drawn to this industry above all others. Outline your working history and attach any relevant reference letters as an appendix to the plan.
Outline all of the other hurdles that must be overcome before you can start operating as a catering service. Depending on the requirements in your state or country you will have a number of licenses and permits to obtain. You may even have to do a short course to get certified in food management or hygiene. It is important to set out the costs involved as well as a time frame for compliance with these local regulations.