I mentioned the financial aspect of a plan earlier, so let me add this. Another fact about financials to consider: not all business activities are about making money. Point being, in most enterprises financial considerations are centric to the document. But there are some other considerations. For example, a few years ago I wrote a plan for a new subsidiary that was focused on developing an inventory of patents. The potential financial returns were years into the future. Those patents may or may not ever have commercial value. Another example is a non_profit enterprise that has need for a complete roadmap for growing their profile in a market, of which a marketing plan would be the centerpiece.
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.