Walter A. Shewhart Introduction and Contribution

Walter A. Shewhart is known as the father of statistical quality control and is also related to the Shewhart cycle.

1. Walter A. Shewhart Rashna Maharjan & Pratima Khadka

2. Background Walter Andrew Shewhart (pronounced like "shoe-heart", March 18, 1891 – March 11, 1967) was an American physicist, engineer and statistician, sometimes known as the father of statistical quality control and also related to the Shewhart cycle. Mr. Shewhart was also awarded his doctorate in physics from the university of California, Berkeley in 1917. Mr.Shewhart is also known as a Pioneer and Visionary of modern quality control. Mr. Shewhart laid the first seed of the quality movement with his book “Economic Control of Quality of Manufactured Product”. His books were used by the Japanese after World War II.with aid of visiting consultants, to help shape modern quality practice in Japan.

3. Involved Organization and Progress In 1918, Mr. Shewhart joined Western Electric Company Inspection Engineering Company inspection Engineering department. On that time Industry quality was limited to inspecting finished product and remogram, and the short text which preceded and followed it, set forth all of the essential principles and considerations which are involved in what we know today as process quality control.ving defective items but later Mr. Shewhart prepared a memorandum only a page in length for which the page was given over a simple diagram which would recognized today as a systematic control chart. Most of Shewhart's professional career was spent as an engineer at Western Electric from 1918 to 1924, and at Bell Telephone Laboratories, where he served in several capacities as a member of the technical staff from 1925 until his retirement in 1956. That diagram, and the short text which preceded and followed it, set forth all of the essential principles and considerations which are involved in what we know today as process quality control.

4. Shewhart’s Contributions Process Improvement Reducing variation Simple schematic control chart No two products will ever be the same two classes of variation, namely special-cause’ and common-cause’ Deming Wheel Cycle and Six Sigma PDCA or plan-do-check-act, DMAIC or define-measure-analyze-improve-control More the number of iterations a product is subjected to, the better the end output.

5. Shewhart’s Contributions on Industrial Quality First task to improve quality was at Nokia Bell Labs Engineers at Nokia Bell Labs (Bell Telephone earlier) had been working to improve the reliability of their transmissions systems Reducing variation in manufacturing processes would have a positive impact on repair costs Nokia Bell Labs ’ discoveries in product variation resulted in the institution of an inspection program, ensuring specification and quality standards to avoid sending defective products to customers.

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