1924 年发明
W.A. Shewhart
1931 发表
1931 年 Shewhart 发表了
“Economic Control of Quality of
Manufacture Product”
1941~1942
制定成美国标准
Z1-1-1941 Guide for Quality Control
Z1-2-1941 Control Chart Method for
analyzing Data
Z1-3-1942 Control Chart Method for
Control Quality During Production
二、控制图的发展
3
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