西格玛水平 |
每百万机会缺陷率 |
合格率 |
6 |
3.4 |
99.9997% |
5 |
233 |
99.977% |
4 |
6210 |
99.379% |
3 |
66807 |
93.32% |
2 |
308537 |
69.2% |
1 |
690000 |
31% |
如合格率为90%,可以说工序能力不足3西格玛。
对
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