Calculated Capability Ratio
计算能力比值
PpFallout (both sides combined)
PP不合格
(双边)
PpkFallout (one side only)
Ppk不合格
(单边)
0.50 0.60 0.70 0.80 0.90 1.00 1.10 1.20 1.30 1.40 1.50 1.60 1.70 1.80 1.90 2.00
133,620 71,860 35,730 16,396 6,934 2,700 966 318 96 26 7 2 0.340 0.060 0.012 0.002
66,810 35,930 17,865 8,198 3,467 1,350 483 159 48 13 3 1 0.170 0.030 0.006 0.001
X and R Control Charts
均值极差控制图
X and S Control Charts
均值标准差控制图
n
A2
D3
D4
d2
1 2 3 4 5 6 7 8 9 10 11 12
2.660 1.880 1.023 0.729 0.577 0.483 0.419 0.373 0.337 0.308 0.285 0.266
- 0 0 0 0 0 0.076 0.136 0.184 0.223 0.256 0.283
- 3.267 2.574 2.282 2.114 2.004 1.924 1.864 1.816 1.777 1.744 1.717
- 1.128 1.693 2.059 2.326 2.534 2.704 2.847 2.970 3.078 3.173 3.258
A3
B3
B4
C4
10 11 12 13 14 15 16 17 18 19 20 21 22 23 24 25
0.975 0.927 0.886 0.850 0.817 0.789 0.763 0.739 0.718 0.698 0.680 0.663 0.647 0.633 0.619 0.606
0.284 0.321 0.354 0.382 0.406 0.428 0.448 0.466 0.482 0.497 0.510 0.523 0.534 0.545 0.555 0.565
1.716 1.679 1.646 1.618 1.594 1.572 1.552 1.534 1.518 1.503 1.490 1.477 1.466 1.455 1.445 1.435
0.9727 0.9754 0.9776 0.9794 0.9810 0.9823 0.9835 0.9845 0.9854 0.9862 0.9869 0.9876 0.9882 0.9887 0.9892 0.9896