What is the Pareto Principle?

Question

I heard about the 80/20 rule. What is this about or how to use it in a practical manner?

Answer 1

The Pareto principle states that for many events roughly 80% of the effects come from 20% of the causes. There is an unequal relationship between inputs and outputs. I think the best way to use this principle is to hone in on what is the 20% of causes that produce the greatest 80% of effects and see how to use that analysis to increase happiness, productivity, or whatever goal you set to achieve.