Business plans may target changes in perception and branding by the customer, client, taxpayer, or larger community. When the existing business is to assume a major change or when planning a new venture, a 3 to 5 year business plan is required, since investors will look for their investment return in that timeframe.
"Half the population in [a] new ABC News poll thinks both job security and retirement prospects in the years ahead will remain worse than their pre-recession levels." ("Poll: Less Job Security is the 'New Normal,'" ABC News The Polling Unit, June 15, 2009, analysis by Gary Langer) This confidence, or lack thereof, is an integral part of an economic cycle.
Estimated Manufacturing Cost: The ideal situation is to contact manufacturers to get a price quote of how much it would cost to build your invention. But this can be difficult if you don't have exact specifications. The other suggested general rule is to divide your Suggested Retail Price by a factor of 4. For example, if your suggested retail price is $80, then your Estimated Manufacturing Cost is $20.
You may not have thought much about your competition or outsourcing some of your work, but things like that will impact your ability to make a profit. And you will find this especially so in the beginning phases of your business. Even you are just opening a lemonade stand in the front yard, you will still need to know what Susie is selling her lemonade for on the next street over!