Six Sigma mutant ninja turtles?

The first time I came across a mature adult calling himself a six sigma black belt I was left feeling slightly bemused, and compelled to ask: ‘Does that mean you’re the sixth mutant ninja turtle?’

You might imagine that the black belter was not at all amused. And yet he found it difficult to articulate what he meant by the terminology.

So here’s a little overview of the concepts that underlie the somewhat juvenile nomenclature.

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