Table 5. AEC and SDEC of the Shewhart... | Emerald Publishing

Table 5.

AEC and SDEC of the Shewhart 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	47.305 (9.806)	32.198 (5.944)	19.740 (1.6230)	16.150 (0.5131)	14.9512 (0.1659)	14.6068 (0.0436)
100	46.506 (4.618)	31.352 (2.504)	19.498 (0.6571)	16.071 (0.2150)	14.9141 (0.0677)	14.5871 (0.0139)
300	46.363 (2.687)	31.220 (1.418)	19.473 (0.3753)	16.057 (0.1220)	14.9077 (0.0387)	14.5840 (0.0075)
500	46.328 (2.073)	31.185 (1.095)	19.460 (0.2919)	16.055 (0.0940)	14.9068 (0.0295)	14.5833 (0.0057)
700	46.311 (1.756)	31.178 (0.9314)	19.457 (0.2449)	16.054 (0.0798)	14.9060 (0.0250)	14.5830 (0.0047)
900	46.301 (1.537)	31.172 (0.8167)	19.456 (0.2158)	16.053 (0.0704)	14.9057 (0.0221)	14.5829 (0.0041)
1100	46.284 (1.404)	31.162 (0.7420)	19.453 (0.1948)	16.053 (0.0632)	14.9056 (0.0201)	14.5828 (0.0038)
∞	46.267	31.142	19.449	16.051	14.904	14.582

m	$\overset{´}{δ}$
m	0.5	1	2	3	4	5
20	47.305 (9.806)	32.198 (5.944)	19.740 (1.6230)	16.150 (0.5131)	14.9512 (0.1659)	14.6068 (0.0436)
100	46.506 (4.618)	31.352 (2.504)	19.498 (0.6571)	16.071 (0.2150)	14.9141 (0.0677)	14.5871 (0.0139)
300	46.363 (2.687)	31.220 (1.418)	19.473 (0.3753)	16.057 (0.1220)	14.9077 (0.0387)	14.5840 (0.0075)
500	46.328 (2.073)	31.185 (1.095)	19.460 (0.2919)	16.055 (0.0940)	14.9068 (0.0295)	14.5833 (0.0057)
700	46.311 (1.756)	31.178 (0.9314)	19.457 (0.2449)	16.054 (0.0798)	14.9060 (0.0250)	14.5830 (0.0047)
900	46.301 (1.537)	31.172 (0.8167)	19.456 (0.2158)	16.053 (0.0704)	14.9057 (0.0221)	14.5829 (0.0041)
1100	46.284 (1.404)	31.162 (0.7420)	19.453 (0.1948)	16.053 (0.0632)	14.9056 (0.0201)	14.5828 (0.0038)
∞	46.267	31.142	19.449	16.051	14.904	14.582

Note:

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