Well, there is i guess, but it's mainly just an intellectual exercise. Your ticket to the future does not depend on how accurately you anticipate it in the present - unless it is your business to counsel others about the future. In that case your best bet is to promote trends.

Planning is useful for economists, for whom time figures into every equation. But for a small business? The future can't be any more than a hunch. And that's good. If and whens are expensive thoughts. Comparing your progress to your previous plans bears little for the future. Setting a 3-year, or 5-year plan makes you a slave to circumstance. It might even be counterproductive to shaping a vision. In the present, you need a vision.