求助：out of control
请问如何理解“Out of control”失控或失效？
尤其在日资企业的人员日本人如何定义失效这个概念？上次日本马自达来公司审核提到这个，好像包含5个方面，可是当时我没有记下来。请各位帮忙。谢谢。
尤其在日资企业的人员日本人如何定义失效这个概念？上次日本马自达来公司审核提到这个，好像包含5个方面，可是当时我没有记下来。请各位帮忙。谢谢。
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WILLIAMZHANG (威望:0) - ISO9000,QS9000,6 SIGMA
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1. One or more points outside of the control limits.
2. A run of eight points on one side of the center line. This pattern indicates a shift in the process output from changes in the equipment, methods, or materials or a shift in the measurement system.
3. Two of three consecutive points outside the 2-sigma warning limits but still inside the control limits. This may be the result of a large shift in the process in the equipment, methods, materials, or operator or a shift in the measurement system.
4. Four of five consecutive points beyond the 1-sigma limits.
5. An unusual or nonrandom pattern in the data: A trend of seven points in a row upward or downward.
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