A Combined Upper-Sided Synthetic S² Chart for Monitoring the Process Variance

Table 2

Comparisons of the combined upper-sided synthetic S² chart and the standard upper-sided synthetic S² chart when .

5	1.2	18	3.2262	5.8	33.88	21	3.2510	34.22
	1.4	9	3.0659	5.4	9.49	11	3.0868	9.76
	1.6	6	2.9857	5.1	4.72	7	2.9678	4.99
	1.8	4	2.9091	4.9	3.09	6	2.9266	3.37
	2.0	3	2.8856	4.7	2.33	4	2.8166	2.64
	2.2	2	2.8189	4.6	1.92	4	2.8166	2.25
	2.4	2	2.8810	4.5	1.67	3	2.7373	2.03
	2.6	2	2.9800	4.4	1.50	3	2.7373	1.88
	2.8	1	2.7958	4.4	1.38	3	2.7373	1.78
	3.0	1	3.0078	4.3	1.30	3	2.7373	1.72
10	1.2	12	2.3007	3.7	17.78	13	2.3040	17.97
	1.4	5	2.1917	3.4	4.62	6	2.1919	4.80
	1.6	3	2.1501	3.2	2.43	4	2.1308	2.66
	1.8	2	2.1262	3.1	1.72	3	2.0865	2.01
	2.0	1	2.0982	3.0	1.40	3	2.0865	1.75
	2.2	1	2.0982	3.0	1.24	2	2.0229	1.63
	2.4	1	2.0982	3.0	1.14	2	2.0229	1.57
	2.6	1	2.4892	2.9	1.08	2	2.0229	1.54
	2.8	1	2.4892	2.9	1.05	2	2.0229	1.52
	3.0	1	2.4892	2.9	1.03	2	2.0229	1.51