https://knowledge-makers.com/control-chart/
https://www.phenitec.co.jp/seihin/images/qc_74_tools.pdf
異常の判定
https://backlog.com/ja/blog/what-is-a-control-chart/#8
https://www.keyence.co.jp/ss/general/manufacture-tips/sqc_course3.jsp
https://excelshogikan.com/qc/qc11/controlchartxbarr.html
https://takuminotie.com/blog/quality/%E7%AE%A1%E7%90%86%E5%9B%B3/
https://monoist.atmarkit.co.jp/mn/articles/1209/05/news007_4.html
https://excelshogikan.com/qc/qc11/controlchartp.html
https://www.keyence.co.jp/ss/general/manufacture-tips/sqc_course2.jsp
https://www.qc-kentei.net/np-control-chart-and-p-control-chart/
https://excelshogikan.com/qc/qc11/controlchartnp.html
https://monoist.atmarkit.co.jp/mn/articles/1210/11/news003.html
https://excelshogikan.com/qc/qc11/controlchartc.html
https://excelshogikan.com/qc/qc11/controlchartu.html