Also known as the 80/20 rule and as a form of power law, the Pareto principle states that, for many situations, roughly 80% of the situation’s effects come from 20% of the causes. It was developed by Vilfredo Pareto who showed that approximately 80% of the land in Italy was owned by 20% of the population.
The principle can be applied in a wide range of areas such as manufacturing, management, human resources, and personal time management. However, though broadly applied, it does not apply to any scenario. Be careful with it.
Primary origin: Vilfredo Pareto