Talk:Control chart/Archives/2011

Factual error

Statement from article: "In 1938, Shewhart's innovation came to the attention of W. Edwards Deming, then working at the United States Department of Agriculture but about to become mathematical advisor to the United States Census Bureau."

"1925-26 Deming worked at the Hawthorne plant of the Western Electric Company on research with telephone transmitters, thus becoming aware of Shewhart's work." A Brief History of Dr. W. Edwards Deming British Deming Association SPC Press, Inc. 1992

I made that change, but I may have been hasty, since this source mentions nothing about that [1]. I suppose he could have done the research as part of his PhD degree, so I'll look for that. Spalding 18:55, 18 June 2006 (UTC)

This source [2] shows that he spent summers there, so I'll leave the edit. Spalding 19:01, 18 June 2006 (UTC)

The Deming Institute chronology is not intended to be comprehensive. Deming met Shewhart in 1927. The 1930s reference in the article is to the lectures Shewhart made at the USDA which led to Deming editing these for publication as Shewhart's 1939 book. Deming and Shewhart had a history before the lectures at UDSA. Leaders100 19:05, 18 June 2006 (UTC)

Sources

Note the following statement: "If the process is in control, all points will plot within the control limits.". Also below in same paragraph: "Note that with three sigma limits, one expects to be signaled approximately once out of every 370 points on average, just due to common-causes.". So, process can be in control and not all points will plot within the control limits. —Preceding unsigned comment added by 208.44.254.2 (talk) 12:32, 21 September 2010 (UTC)

Infobox chart truncation

The infobox truncates the chart in every browser I threw at it. The terminal "L"s in the labels for the upper and lower limits are both cut off. I profess ignorance of mechanisms for forcing a resizing of the chart or the infobox, but one or the other (or both) should be edited such that the entire chart appears. Does anyone know how to make such edits? LUxlii (talk) 21:19, 8 December 2011 (UTC)