Table 6. AEC and SDEC of the EWMA... | Emerald Publishing

Table 6.

AEC and SDEC of the EWMA Control chart when different phase I samples are used to estimate the process parameters

m	$\overset{´}{δ}$
m	0.5	1	2	3	4	5
20	27.961 (7.846)	21.660 (1.952)	18.625 (0.7842)	17.422 (0.5561)	16.7211 (0.4563)	16.278 (0.3922)
100	25.289 (2.021)	20.859 (0.6155)	18.179 (0.2653)	17.073 (0.1886)	16.4227 (0.1538)	16.0264 (0.1360)
300	24.875 (0.9666)	20.684 (0.3052)	18.078 (0.1246)	16.987 (0.0814)	16.3506 (0.0652)	15.9660 (0.0577)
500	24.788 (0.7140)	20.644 (0.2270)	18.053 (0.0877)	16.969 (0.0558)	16.3337 (0.0441)	15.9523 (0.0383)
700	24.752 (0.5901)	20.630 (0.1894)	18.043 (0.0714)	16.961 (0.0449)	16.3264 (0.0337)	15.9458 (0.0295)
900	24.728 (0.5208)	20.620 (0.1622)	18.036 (0.0595)	16.956 (0.0378)	16.3221 (0.0284)	15.9422 (0.0245)
1100	24.715 (0.4630)	20.612 (0.1460)	18.033 (0.0535)	16.953 (0.0329)	16.3197 (0.0240)	15.9403 (0.0212)
∞	24.655	20.586	18.015	16.939	16.307	15.929

m	$\overset{´}{δ}$
m	0.5	1	2	3	4	5
20	27.961 (7.846)	21.660 (1.952)	18.625 (0.7842)	17.422 (0.5561)	16.7211 (0.4563)	16.278 (0.3922)
100	25.289 (2.021)	20.859 (0.6155)	18.179 (0.2653)	17.073 (0.1886)	16.4227 (0.1538)	16.0264 (0.1360)
300	24.875 (0.9666)	20.684 (0.3052)	18.078 (0.1246)	16.987 (0.0814)	16.3506 (0.0652)	15.9660 (0.0577)
500	24.788 (0.7140)	20.644 (0.2270)	18.053 (0.0877)	16.969 (0.0558)	16.3337 (0.0441)	15.9523 (0.0383)
700	24.752 (0.5901)	20.630 (0.1894)	18.043 (0.0714)	16.961 (0.0449)	16.3264 (0.0337)	15.9458 (0.0295)
900	24.728 (0.5208)	20.620 (0.1622)	18.036 (0.0595)	16.956 (0.0378)	16.3221 (0.0284)	15.9422 (0.0245)
1100	24.715 (0.4630)	20.612 (0.1460)	18.033 (0.0535)	16.953 (0.0329)	16.3197 (0.0240)	15.9403 (0.0212)
∞	24.655	20.586	18.015	16.939	16.307	15.929

Note:

For every value of shift size, the first value is the AEC, and the value between brackets is the SDEC