Lean Six Sigma is a process improvement methodology that combines two distinct but complementary frameworks: Lean and Six Sigma. The Lean component focuses on maximizing customer value by systematically identifying and eliminating waste—such as delays, defects, and unnecessary steps—to increase process speed and efficiency. Six Sigma complements this by using a data-driven, statistical approach, most notably the DMAIC (Define, Measure, Analyze, Improve, Control) cycle, to reduce process variation and eliminate defects, thereby increasing quality and predictability. By integrating these principles, organizations in fields ranging from manufacturing to software development can create streamlined, reliable, and high-quality processes that deliver more value with fewer resources.