The business plan is the truth serum to your idea. It will either make or break your plan to start a business by revealing its true potential. The creation of a plan also helps uncover the important details you may have otherwise overlooked. Who are your customers and how will you attract them? How are you going to manage your inventory and cash flow? Creating a business plan will help you organize your thoughts, test your true desire to start the business and allow everyone involved to be more in tune with one another.