What key principle differentiates Six Sigma from Lean Manufacturing?

The key principle that differentiates Six Sigma from Lean Manufacturing is the focus on reducing variation through statistical analysis. Six Sigma employs a data-driven approach to identify defects and variations in processes, utilizing statistical tools to measure and analyze performance. The core philosophy of Six Sigma revolves around improving quality by minimizing variability in processes, ensuring that products and services meet customer expectations consistently.

While Lean Manufacturing does emphasize eliminating waste and enhancing efficiency, it does not specifically address variation in the same depth as Six Sigma. Lean focuses on streamlining processes and removing non-value-added activities to improve overall flow and speed. Therefore, the unique aspect of Six Sigma—its structured methodology for reducing process variation and employing statistical analysis—is what sets it apart from Lean practices.