Talk:Control chart

Query
Re "strictly it is an approximation of standard deviation, the does not make the assumption of homogeneity of process over time that the standard deviation make" should there be a word between the and does?  Ϣere Spiel  Chequers  22:02, 3 November 2021 (UTC)

Not all control charts are Shewhart charts Comment
the opening sentence says 'also known as Shewhart charts'. That's incorrect; Shewhart's chart is just one of several types of control chart (consider cusum, manhattan, moving range, moving average etc). I'd suggest _either_ removing this from the intro and covering different chart types in separate subsections _or_ re-titling the article 'Shewhart chart' and linking to other articles for other QC chart types. — Preceding unsigned comment added by Slrellison (talk • contribs) 18:36, 19 February 2022 (UTC)