That’s certainly a topic for a lively discussion! We view them as valuable methodologies that both offer value in addressing specific challenges and complement each other perfectly. In the Lean Framework, we describe the five elements that make up the Lean. One of the underlying techniques we use is improvement based on the scientific method. We often refer to this method as PDCA; in Six Sigma, the term DMAIC is more commonly used. Six Sigma places a strong emphasis on the quantitative aspect of this approach, involving extensive statistical analysis. Ultimately, it is often essential to have a team of specialists who master this, but much more is required first: foundational stability, flow and pull, a comprehensive management system, an understanding of customer value, and targeted development of people— Lean . Lean more accessible and applicable to a wide range of issues, while Six Sigma is typically used for specific quality issues. A strength of Six Sigma is its project-based approach; in Lean , you Lean employ various approaches. The combination Lean Sigma is primarily Six Sigma with a “dash” Lean; it is not a merger of two complete methodologies, even though one might think so.