According to business experts at SCORE, “…the real value of creating a business plan is not in having the finished product in hand; rather, the value lies in the process of researching and thinking about your business in a systematic way. The act of planning helps you to think things through thoroughly, study and research if you are not sure of the facts, and look at your ideas critically. It takes time now, but avoids costly, perhaps disastrous, mistakes later."
For more on writing a business plan, visit the the SCORE website