On Efficient Monitoring of Weibull Lifetimes Using Censored Median Hybrid DEWMA Chart

Table 9

Out-of-control ARL Values for CM-HDEWMA and CM-DEWMA control charts for n = 7 with .

n		7
,		CM-DEWMA chart shifts						CM-HDEWMA chart shifts
		30% increase	30% decrease	20% increase	20% decrease			30% increase	30% decrease	20% increase	20% decrease
Pc		Shifts				Pc		Shifts
0.2		7.68	4.08	13.21	11.13	0.20		6.66	3.80	10.72	8.25
0.3		10.92	3.96	25.96	10.30	0.30		8.34	3.31	24.45	8.33
0.4		22.54	3.18	48.73	7.18	0.40		20.47	1.46	44.94	7.07