The venture capital conference was in full swing, and a current of excitement buzzed in the air. An entrepreneur known as "Allen" arrived, wondering about the particulars of constructing a business plan. Did he even need one? How long should it be? "I've heard everything from one page to 50 pages. One expert says the only reason a small business needs a business plan is if they're looking for investors or trying to get a loan. What should I do?"