In addition, it provides ways to improve efficiencies in a business structure, improve the quality of the organization processes and increase the bottom-line profit. Six Sigma is a data-driven methodology that contains statistical tools and techniques to define the problem and evaluate each step of a process. What do you know about Six Sigma illustrate their all points? … Lean Six Sigma is a fact-based, data-driven philosophy of improvement that values defect prevention over defect detection. Six Sigma focuses on reducing process variation and enhancing process control, whereas lean drives out waste (non-value added processes and procedures) and promotes work standardization and flow.