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The Western Electric rules are decision rules in statistical process control for detecting out-of-control or non-random conditions on control charts. [1] Locations of the observations relative to the control chart control limits (typically at ±3 standard deviations) and centerline indicate whether the process in question should be investigated for assignable causes.
They are a set of modified Western Electric rules, developed by James Westgard and provided in his books and seminars on quality control. [1] They are plotted on Levey–Jennings charts, wherein the X-axis shows each individual sample, and the Y-axis shows how much each one differs from the mean in terms of standard deviation (SD). The rules ...
Western Electric Co., Inc. was an American electrical engineering and manufacturing company that operated from 1869 to 1996. A subsidiary of the AT&T Corporation for most of its lifespan, Western Electric was the primary manufacturer, supplier, and purchasing agent for all telephone equipment for the Bell System from 1881 until 1984, when the Bell System was dismantled.
Date/Time Thumbnail Dimensions User Comment; current: 01:01, 7 October 2009: 230 × 200 (76 KB): GMcGlinn~commonswiki: cleared of svg black block disease : 00:31, 7 October 2009
Walter Andrew Shewhart (pronounced like "shoe-heart"; March 18, 1891 – March 11, 1967) was an American physicist, engineer and statistician. He is sometimes also known as the grandfather of statistical quality control and also related to the Shewhart cycle.
Deming received a BS degree in electrical engineering from the University of Wyoming at Laramie (1921), an MS degree from the University of Colorado (1925), and a PhD from Yale University (1928). Both graduate degrees were in mathematics and physics. He had an internship at Western Electric's Hawthorne Works in Cicero, Illinois, while
The film is loosely based on the works of Hermann Hesse's 1922 novel Siddhartha, [4] and 1930 novel Narcissus and Goldmund (wherein two young friends take divergent paths in life, to reunite and share similar perspectives); surrealistically adapted as a musical Western.
It seems like every web page I visit that mentions Western Electric rules, says that rule 4 is violated if just eight consecutive points fall on the same side of the centerline.--216.254.190.174 13:09, 3 July 2009 (UTC) This could be in the interpretation I think. Do you count the first point as part of the deviant set?
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