Walter A. Shewhart: Cause

Walter A. Shewhart was American statistician. Explore interesting quotes on cause.
Walter A. Shewhart: 20   quotes 1   like

“Postulate 1. All chance systems of causes are not alike in the sense that they enable us to predict the future in terms of the past.
Postulate 2. Constant systems of chance causes do exist in nature.
Postulate 3. Assignable causes of variation may be found and eliminated.”

Walter A. Shewhart

Source: Economic Control of Quality of Manufactured Product,1931, p. 8

Nature , Sense , Chance , Past

“Rule 2. Any summary of a distribution of numbers in terms of symmetric functions should not give an objective degree of belief in any one of the inferences or predictions to be made therefrom that would cause human action significantly different from what this action would be if the original distributions had been taken as evidence.”

Walter A. Shewhart

[Shewhart, Walter A., Deming, William E., Statistical Method from the Viewpoint of Quality Control, The Graduate School, The Department of Agriculture, 1939, 88]
Economic Control of Quality of Manufactured Product,1931

“Based upon evidence such as already presented, it appears feasible to set up criteria by which to determine when assignable causes of variation in quality have been eliminated so that the product may then be considered to be controlled within limits. This state of control appears to be, in general, a kind of limit to which we may expect to go economically in finding and removing causes of variability without changing a major portion of the manufacturing process as, for example, would be involved in the substitution of new materials or designs.”

Walter A. Shewhart

Source: Economic Control of Quality of Manufactured Product,1931, p. 24

Appearance , Change