The 80/20 Principle is a book by Richard Koch that explores the concept of Pareto's Principle, which suggests that a minority of causes, inputs, or efforts usually lead to a majority of results, outputs, or rewards. The book delves into how this principle can be applied to various aspects of life, work, and business to achieve greater efficiency and effectiveness.

Koch explains that in many situations, roughly 80% of the results come from 20% of the causes. This principle can be seen in numerous contexts, from business and economics to personal productivity and time management. By understanding and harnessing the 80/20 principle, individuals and organizations can identify the most significant factors that drive success and focus their efforts on maximizing those factors.

The book provides examples and case studies to illustrate how the 80/20 principle can be used to improve decision-making, resource allocation, and problem-solving. It also encourages readers to rethink their approach to work and life, emphasizing the importance of prioritization, simplification, and leveraging the most impactful actions.