Shewhart Control Charts

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  • (3) 要素技術系 シューハート管理図
  • シューハート管理図
  • シューハート カンリズ

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In the early development of quality control in Japan, it would not be an exaggeration to say that the principle of Shewhart control charts was really that of quality control. The principle is to control process by the inductive approach. In this paper, some key elements (three sigma rule, statistical state of control, rational subgroup and pattern tests for assignable causes) and some practical considerations are reviewed. They can exactly represent the principle. Finally, the future prospects on control charts are discussed.

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