the 80 20 rule came from vilfredo pareto.
the 80 20 rule came from vilfredo pareto.
where did the 80 20 rule come from?
vilfredo pareto,
pareto principle









































the pareto principle (also known as the 80/20 rule, the law of the vital few, or the principle of factor sparsity) states that, for many events, roughly 80% of the effects come from 20% of the causes. management consultant joseph m. juran suggested the principle and named it after italian economist vilfredo pareto, who noted the 80/20 connection while at the university of lausanne in 1896, as published in his first work, "cours d'économie politique". in it, pareto showed that approximately 80% of the land in italy was owned by 20% of the population.
pareto principle
the pareto principle is a popular example of such a "law". it states that roughly 80% of the effects come from 20% of the causes, and is thus also known as the 80/20 rule. in business, the 80/20 rule says that 80% of your business comes from just 20% of your customers. in software engineering, it's often said that 80% of the errors are caused by just 20% of the bugs. 20% of the world creates roughly 80% of worldwide gdp. 80% of healthcare expenses in the us are caused by 20% of the population.
empirical statistical laws