Six Sigma is a data-driven approach to improving quality and efficiency in business processes. Six Sigma aims for near-perfect performance, targeting a goal of no more than 3.4 defects per million opportunities. The methodology employs the framework of DMAIC (Define, Measure, Analyze, Improve, Control) for delivering improvement projects. Six Sigma practitioners use statistical tools to identify root causes of defects and inefficiencies, enabling precise solutions that improve outcomes, increase customer satisfaction, and contribute significantly to organizational cost reduction and profitability.