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).
Sometimes it takes a significant event or change in existing conditions for a business to create a written plan. I think it's safe to say that the state of the economy is a significant change that should prompt business owners to alter the way they've been doing things. If you already have a business plan, it's time to get it out and revise it.
Suggested Retail Price: Base the suggested retail price on comparable market prices and other relative assumptions and factors. For example, if the invention combines the task of two or more existing products on the market, provide the cost of using those products separately and then demonstrate how your invention is priced such that it saves the consumer time and money. A good example is a food processor. You would provide the cost of knives, cutting boards, and the time it takes to cut everything. Whereas your invention, the food processor, is priced less than all of those things combined, plus you have the added value of convenience and time savings.
For an online business, a detailed and in depth business plan is usually not necessary unless you are trying to combine your online business with a traditional business. For most online business startups, the detail involved with planning a traditional business is not required. However, it would still be beneficial to you if most of the topics were still covered, even if only briefly. Having a written plan in front of you will help you to focus on important aspects of the business.