So, why is business planning so crucial? In a word, it provides "clarity". Investing time to develop a plan provides precise clarification of the company vision to both employees and customers. In addition, it provides a mechanism to gauge the results of the business and provides the foundation for future growth plans. In the long haul, it enhances the company valuation through fiscal responsibility, which provides the story of opportunity to any future investor or employee. In short, the benefits of planning allow the company to articulate a common vision to align resources and make an efficient use of investment dollars. A company that is perceived to be a "well_oiled machine" is attractive on many fronts _ both externally with investors and internally with employees through job satisfaction and increased tenure.
Another consideration. Should the business plan be a document that is focused on selling an idea for a product or service? For many years I worked in a company that did not want anything in a business plan that could be construed as showing a bias towards or against a project. The mantra was to only present facts in the business plan. The Operations Research Department was there to review the analysis as being unbiased. To handle the "what if" scenarios or sensitivity analysis we prepared a supplemental analysis documents which were mostly financial oriented. Personally, I like a factual approach and use the presentation of the final document to point out the conservative aspects of the content.