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

Table 4

Comparisons of the combined upper-sided synthetic S² chart and several run rules S² charts when .

2-of-3	3-of-4	4-of-5
5	1.2	33.88	44.29	43.83	44.96
	1.4	9.49	12.90	13.72	14.92
	1.6	4.72	6.58	7.54	8.63
	1.8	3.09	4.44	5.41	6.43
	2.0	2.33	3.48	4.45	5.44
	2.2	1.92	2.97	3.94	4.92
	2.4	1.67	2.68	3.64	4.63
	2.6	1.50	2.49	3.46	4.44
	2.8	1.38	2.36	3.34	4.32
	3.0	1.30	2.28	3.26	4.24
10	1.2	17.78	22.60	21.62	21.89
	1.4	4.62	6.15	6.75	7.56
	1.6	2.43	3.46	4.27	5.17
	1.8	1.72	2.64	3.53	4.47
	2.0	1.40	2.31	3.25	4.21
	2.2	1.24	2.16	3.13	4.10
	2.4	1.14	2.09	3.07	4.05
	2.6	1.08	2.05	3.04	4.03
	2.8	1.05	2.03	3.02	4.02
	3.0	1.03	2.02	3.01	4.01