As Dwight Schrute would say on "The Office":
I've very directly asked Virginia Mason's CEO Dr. Gary Kaplan if they do anything with Six Sigma and he says no.
They use Lean, as in the Toyota Production System. No belts. No formal Six Sigma.
The same is the case at ThedaCare. I know because I've asked them. They don't do Six Sigma.
So, if an organization doesn't do Lean and Six Sigma, you can't call what they do "Lean Sigma."
It's just Lean.
There's a book on the market about Lean Six Sigma for hospitals that makes the same sloppy or misinformed error:
Does it matter? Yes, it matters. Wrongly giving credit to Six Sigma encourages people to sink time and resources into an approach that might not be necessary. If you want to use Six Sigma, then great. If you want to combine Lean and Six Sigma, go for it.
Just don't call refer to Lean as "Lean Sigma."
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