This document provides an overview of Six Sigma. It begins with defining Six Sigma as a data-driven approach to reducing defects and variations in processes. It then outlines the typical Six Sigma roadmap and process, including the Define, Measure, Analyze, Improve, and Control (DMAIC) methodology. Applications of Six Sigma across various industries like manufacturing, banking, healthcare, and IT are also highlighted. The presentation concludes with emphasizing that Six Sigma focuses on defining processes, measuring performance, identifying root causes of problems, making improvements, and monitoring ongoing performance.