Lean Six Sigma is a process improvement methodology combining Lean manufacturing techniques with Six Sigma tools and strategies.
Lean is a methodology that works on the principle of maximising value to customers while minimising waste. It focuses on reducing waste from processes to reduce costs of production while enhancing product/service quality.
Six Sigma combines the use of various tools and strategies to achieve process improvement. For process improvement, it uses the project methodology of Define, Measure, Analyse, Improve and Control (DMAIC). For product designing, it uses Design for Six Sigma (DFSS). The aim of Six Sigma is to improve processes, which leads to greater productivity, reduced costs, and enhanced quality of the product/service.
In Lean Six Sigma, Lean and Six Sigma methodologies are combined to eliminate waste and improve processes.