Pareto Principle
The 80/20 Rule, or Pareto Principle, holds that around 80% of outcomes stem from 20% of causes. Named after economist Vilfredo Pareto, it reflects the idea that a small share of effort or input often produces most of the results.
Whether applied to business, economics, or time management, the 80/20 Rule is about identifying and prioritizing the few elements that actually drive most of the outcome.