With a simple observation that in his garden, 80 percent of the peas were borne by 20 percent of the pods, Vilfredo Pareto created a revolutionary principle. Known as the Pareto's principle or the rule of 80-20, the core of this principle lies in the fact, that 80 percent of the results which one receives in a field of activity is a result of 20 percent of the efforts. In case of business, merely 20 percent of the customers help in generating 80 percent of the revenue. This