A New Generalized Range Control Chart for the Weibull Distribution

Table 3

The values of ARLs when , , , and .

	,
	1		1.5		2
	4.245		4.24		4.245
	ARL	SD	ARL	SD	ARL	SD
1	370.89	362.40	371.97	366.53	369.51	359.22
0.99	346.87	346.27	344.74	338.86	336.47	328.97
0.98	313.37	304.43	311.20	308.88	301.17	300.46
0.95	225.28	229.94	227.23	228.12	223.06	224.30
0.92	168.89	164.14	169.99	167.66	165.44	162.40
0.9	139.04	140.38	136.79	136.48	134.74	134.46
0.85	85.76	85.73	83.86	83.05	81.63	80.44
0.8	52.48	51.16	52.38	51.41	51.54	50.79
0.75	32.75	32.81	32.61	32.48	32.30	31.65
0.7	21.20	18.72	19.37	17.65	19.57	19.11
0.65	13.58	13.05	13.86	13.09	12.28	12.72
0.6	8.22	7.40	8.20	8.20	9.65	7.91