See this article from Quality Mag:
"By only doing Lean [and not Six Sigma] you sacrifice the benefits of quality."No no no no no no.
This is just factually incorrect.
Again, I'll point you to the Toyota web page for the Toyota Production System.
TPS is about flow AND quality. They go hand in hand. Better flow leads to better quality, and vice versa.
Lean and TPS have so many methods and mindsets that improve quality in very direct ways, such as:
- Error proofing
- Andon cords (stop the line)
- A culture of not blaming individuals for systemic problems