This document discusses the application of Pareto's Principle, also known as the 80/20 rule, to project management. It states that 20% of project work typically accounts for 80% of the time and resources. The document provides examples of how the 80/20 rule applies in other contexts like customer service, business activities, wealth distribution, and more. It also discusses using the principle to identify the most important 20% of tasks in a project in order to make efficient use of resources.