k.a., pillars) which is on the list of huge main reasons why Toyotas are so dependable. From these, "Gemba" and "Genchi Genbutsu" may very well be common phrases if you understand anything at all about Lean 6 Sigma, https://kallumgjkv938623.blogdigy.com/the-ultimate-guide-to-toyota-10k-truck-43031886