These business plans are short—as short as one page—and have very little detail.
There are definitely more benefits to creating and sticking to a business plan including being able to think through ideas without putting too much money into them—and, ultimately, losing in the end.
A good business plan should outline all the costs and the downfalls of each decision a company makes.
A business plan lays out a written plan from a marketing, financial and operational viewpoint.
Although they're especially useful for new companies, every company should have a business plan.