...The causes of variation in product quality characteristics can be roughly divided into two categories. One is variation that occurs even when the same work is performed according to standards. This is one of the infinite scientific causes that cannot be controlled by current technology and standards, and is called a chance cause or unavoidable cause. The other is when something abnormal occurs in the process, for example when standards are not followed or are inadequate, and this is a cause of particularly large variation, and is called an abnormal cause or an assignable cause. ... *Some of the terminology explanations that mention "random cause" are listed below. Source | Heibonsha World Encyclopedia 2nd Edition | Information |
… 製品の品質特性にばらつきを与える原因は,大きく二つに分けることができる。その一つは標準に従って同じ作業を行っているにもかかわらず発生するばらつきで,これは科学的に無限にある原因の中で,現在の技術,標準で押さえ切れないもので,偶然原因chance causeとか不可避的原因といわれる。他の一つは工程に何か異常が起こって,たとえば標準が守られなかったり標準が不備であるために,とくに大きなばらつきを与える原因で異常原因とか突きとめうる原因assignable causeなどと呼ばれる。… ※「偶然原因」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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