Walter A. Shewhart Quotes

United States, Physicist
March 18, 1891 – March, 11, 1967.

Walter Andrew Shewhart was an American physicist, engineer and statistician, sometimes known as the father of statistical quality control and also related to the Shewhart cycle.

Also known as Engineer, Statistician

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

Walter A. Shewhart
- Found
- Causes
- Variation
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

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

Walter A. Shewhart
- Nature
- Causes
- Constant
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
- Chance
- Causes
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
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