This document introduces Lean thinking and the PDSA (Plan-Do-Study-Act) method. Lean focuses on maximizing value for the customer while minimizing waste. The benefits of Lean include stability, organizational vitality, and respect for people. PDSA is Lean's version of the scientific method for testing changes by planning a change, doing it, studying the results, and acting on what is learned. The document provides details on how to structure each component of a PDSA cycle, including defining the problem, setting goals, analyzing root causes, developing countermeasures, experimenting, studying outcomes, and adjusting for continuous improvement.