Read more here
http://www.wisegeek.com/what-is-roi.htm
Friday, October 5, 2012
What is ROI?
When someone in business talks about their ROI, they mean their Return On Investment. A savvy business person will want to know all about the ROI of a project, because it tells him or her how successful it is. ROI is usually a matter of simple mathematics, although it can involve a number of different factors.
