Uncontrolled variation is the enemy of quality.
--
Attributed to Edward Deming (1980) in: Chang W. Kang, Paul H. Kvam (2012) Basic Statistical Tools for Improving Quality. p.19W. Edwards Deming
» W. Edwards Deming - all quotes »
[A]lthough species may be discrete, they have no immutable essence. Variation is the raw material of evolutionary change. It represents the fundamental reality of nature, not an accident about a created norm. Variation is primary; essences are illusory. Species must be defined as ranges of irreducible variation.
Stephen Jay Gould
But all evolutionary biologists know that variation itself is nature's only irreducible essence. Variation is the hard reality, not a set of imperfect measures for a central tendency. Means and medians are the abstractions.
Stephen Jay Gould
If E1 is the cause of E2, then a small variation (a mark) in E1 is associated with a small variation in E2, whereas small variations in E2 are not associated with variations in E1. If we wish to express even more clearly that this concept does not contain the concept of temporal order, we can express it in the following form, where events that show a slight variation are designated E*: E1E2, E1*E2*, E1E2* and never the combination E1*E2.
Hans Reichenbach
Well, is he [bin Laden] the enemy? Next slide. Or is this man [Saddam] the enemy? The enemy is none of these people I have showed you here. The enemy is a spiritual enemy. He’s called the principality of darkness. The enemy is a guy called Satan.”
William G. Boykin
In Europe and in America, people are now more interested in the cost of quality and in systems of quality-audit. But in Japan, we are keeping very strong interest to improve quality by use of methods which you started....when we improve quality we also improve productivity, just as you told us in 1950 would happen.
W. Edwards Deming
Deming, W. Edwards
Demirchyan, Karen
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