シックス・シグマ
Lean and Six Sigma have many similarities but are different processes and were developed for different purposes. The first difference between the two methods is problem identification. While Lean focuses the problem of inefficiency around the eight wastes, Six Sigma focuses on identifying sources of variation to reduce inefficiency. In addition, Lean and Six Sigma use different tools. While Lean uses more data visualization tools, Six Sigma uses more numerical and analytical-focused tools.