In operations management, Lean Six Sigma describes a process improvement approach that combines waste reduction with variation reduction.
Lean thinking focuses on improving flow and removing activities that do not add value for customers. Six Sigma uses data and statistical methods to reduce defects and unwanted variation. Together, Lean Six Sigma gives organizations a vocabulary and set of methods for improving quality, speed, and efficiency.
Projects often use the DMAIC sequence: define, measure, analyze, improve, and control. This sequence is generally applied to an existing process. Lean Six Sigma can be used in manufacturing, healthcare, finance, logistics, and service operations, not only on factory floors.
Lean Six Sigma is not simply a synonym for cutting costs. Removing resources without understanding customer value or process capability can damage quality. The approach works best when teams establish measurable problems, analyze causes, test changes, and monitor results.