An effective Invention Business Plan is an inventor's best tool for efficiently navigating through the invention process. As an experienced inventor, I've learned that an idea is not perceived as a viable business opportunity until it can be effectively communicated on paper (or any other readable format).
I mentioned that the 'writing of a business plan' as one of the pivotal steps involved in setting up a successful business. By now you should understand the need for writing a business plan. Writing a business plan, for a traditional brick and mortar business, will probably take a lot of time. It may take up to 100 hours or even more. For obvious reasons, a new business needs to carry out a lot of research before a business plan can even be developed.
If an online business, you need to go into detail how you will attract customers to your website. General statements like "I will use Face Book ads and email marketing" will contribute almost nothing to helping your cause unless you have detailed statistical analysis of tests you have conducted or of another similar business you have been associated with. If you do not have any data upon which you reference your estimates, it could show lack of proper thought to the remainder of your business plan.
Basically, consumers are hunkering down to limit spending, save money, conserve resources, and change the way they've been living. The major influence on the health of an economy is the psychological state of its consumers.