Lean focuses on efficiency, such as cutting out waste. Six Sigma on the other hand focuses on quality, such as controlling the quality of products and services. When combined you have Lean Six Sigma. An approach that integrates both methodologies to form what is widely adopted and valued by organizations across every sector and industry. A Lean Six Sigma certification course covered the same topics as a Six Sigma course, the only difference is that it also covers Lean topics and integrates both concepts. In today’s competitive business environment, most organization prioritize Lean Six Sigma as the methodology of choice.