Which, in turn, originated from the work done by American statistician, and professor, Edwards Deming, who helped rebuild Japan after WWII: http://en.wikipedia.

Which, in turn, originated from the work done by American statistician, and professor, Edwards Deming, who helped rebuild Japan after WWII: http://en.wikipedia.org/wiki/W._Edwards_Deming http://en.wikipedia.org/wiki/W._Edwards_Deming