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.
Everyone has prepared a business plan. Well, should that read, everyone should have prepared a business plan? My thinking is that these tend only to be prepared when they are needed, rather than as a useful business tool for all senior management. My top five ingredients are: 1. Understand what a business plan is; 2. Understand what you intend to use it for; 3. Identify and implement the critical steps to achieving a successful business plan; 4. Understand what needs to be included in the plan; 5. Be aware of gaps or weaknesses in your plan.