...Even if the points are within the limit line, they may be judged to be abnormal if they show a clear tendency to be lined up on one side of the center line. There are several types of control charts, such as the -R (Xbar R) control chart for continuous measurements, the p control chart for the rate of defects, and the u and c control charts for the number of defects. The -R control chart, which is a typical control chart, is shown in the figure below. ... *Some of the terminology used in relation to "(■1)-R Control Chart" is listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
…また点が限界線の中にあっても,中心線に対し一方の側に片寄って並ぶなどの傾向が顕著にみられるときも異常と判断することがある。 管理図にはいくつかの種類があり,連続的な測定値に‐R(エックスバーアール)管理図,不良率に対してはp管理図,欠点数に対してはu管理図,c管理図などが用いられる。管理図の中の代表的なものである‐R管理図を図に示す。… ※「(■1)‐R 管理図」について言及している用語解説の一部を掲載しています。 出典|株式会社平凡社世界大百科事典 第2版について | 情報 |
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