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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 ...
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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?
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.
The Classic Christmas Album is an expanded reissue of Earth, Wind & Fire's 21st studio album, Holiday, released in 2015 by Sony/Legacy. [1] The album reached No. 34 on the Billboard Top R&B/Hip Hop Albums chart and No. 18 on the Billboard Top R&B Albums chart. [2] [3]
Illumination is the nineteenth studio album by American band Earth, Wind & Fire, released in September 2005 on Sanctuary. [1] The album rose to No. 8 on the Billboard Top R&B/Hip-Hop Albums chart and No. 32 on the Billboard 200 chart. Illumination was also Grammy nominated within the category of Best R&B Album.
During November 1988, EWF issued a compilation album titled The Best of Earth, Wind & Fire, Vol. 2. The album was certified US Gold. [221] [222] A new single, from the album, called "Turn on (The Beat Box)" reached No. 26 on the Billboard Hot R&B Songs chart. [223] EWF went on to be nominated for an NAACP Image Award in the category of Best ...