(Entrepreneur) — How long should a business plan be? How many pages? What should it cover? It covers what you need to manage your business better. Form follows function. Consider the illustration here, which comes from my Plan-As-You-Go Business Plan book. The plan is in the big circle in the middle. The plan is what’s supposed to happen, why, who’s responsible and what that means for managing resources. It’s strategy and what you’re going to do to implement that strategy.