The Pareto chart emphasizes the 80/20 rule. It helps strategy data to uncover the most important issue to work on. The saying goes 80% of the problems come from 20% of the ....causes. It helps to narrow down a course of action by finding the 20%.
80% of traffic comes from accidents (of course you need data to support your hypotheses. You may be surprised....could it be because of slow drivers, obstacles on the highway, weather
