Walter A. Shewhart Quotes

• 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.

  Walter A. Shewhart

  Past, Causes, Chance

  "Economic Control of Quality of Manufactured Product" by Walter A. Shewhart, (p. 8), 1931.

  48 Copy quote

• Postulate 3. Assignable causes of variation may be found and eliminated.

  Walter A. Shewhart

  Variation, May, Causes

  "Economic Control of Quality of Manufactured Product". Book by Walter A. Shewhart, p. 8, 1931.

  37 Copy quote

• Rule 1. Original data should be presented in a way that will preserve the evidence in the original data for all the predictions assumed to be useful.

  Walter A. Shewhart

  Data, Way, Predictions

  Walter A. Shewhart (2012). “Statistical Method from the Viewpoint of Quality Control”, p.88, Courier Corporation

  25 Copy quote

• Postulate 2. Constant systems of chance causes do exist in nature.

  Walter A. Shewhart

  Causes, Chance, Constant

  "Economic Control of Quality of Manufactured Product" by Walter A. Shewhart, (p. 8), 1931.

  20 Copy quote

• Both pure and applied science have gradually pushed further and further the requirements for accuracy and precision. However, applied science, particularly in the mass production of interchangeable parts, is even more exacting than pure science in certain matters of accuracy and precision.

  Walter A. Shewhart

  Requirements, Matter, Mass

  "Statistical Method from the Viewpoint of Quality Control". Book by Walter A. Shewhart, p. 120, 1931.

  28 Copy quote

• Every sentence in order to have definite scientific meaning must be practically or at least theoretically verifiable as either true or false upon the basis of experimental measurements either practically or theoretically obtainable by carrying out a definite and previously specified operation in the future. The meaning of such a sentence is the method of its verification.

  Walter A. Shewhart

  Order, True Or False, Measurement

  Walter A. Shewhart (2012). “Statistical Method from the Viewpoint of Quality Control”, p.94, Courier Corporation

  24 Copy quote

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