Reducing variability is one of the main goals of the classic quality engineering. See Deming's work on statistical process control used in wartime production d

Reducing variability is one of the main goals of the classic quality engineering. See Deming's work on statistical process control used in wartime production during WWII: http://en.wikipedia.org/wiki/W._Edwards_Deming http://en.wikipedia.org/wiki/W._Edwards_Deming I'm glad Facebook is following this old school engineering tradition