Table 4.

The ${\mathit{ARL}}_{1HEPD}\text{and}{\mathit{ASS}}_{1HEPD}$ values of proposed CC using HEPD when its scale parameter is shifted using $r_{\mathit{oHEPD}}=300\text{and}n=30$.

	$\lambda =2$		$\lambda =4$
Control limits$\to$	${\mathit{UCL}}_1=$ 21.8443 ${\mathit{LCL}}_1=$ 13.9010	${\mathit{UCL}}_2=$ 21.7762 ${\mathit{LCL}}_2=$ 13.9690	${\mathit{UCL}}_1=12.949$ ${\mathit{LCL}}_1=$ 5.5664	${\mathit{UCL}}_2=12.913$ ${\mathit{LCL}}_2=5.6016$
Control coefficient $\to$	$W_1=$ 1.4775	$W_2=$ 1.4522	$W_1=1.4590$	$W_2=1.4451$
Truncated constant $\to$	$q_1==$ 1.045346		$q_1=0.5729$

$e$	${\mathit{ARL}}_{1HND}$	${\mathit{ASS}}_{1HND}$	${\mathit{ARL}}_{1HEPD}$	${\mathit{ASS}}_{1HEPD}$
1	300.48	33.60	305.65	34.22
0.97	56.14	33.88	53.36	34.35
0.95	30.96	34.11	31.36	34.46
0.93	19.43	34.37	20.96	34.59
0.90	11.02	34.80	12.93	34.79
0.85	5.23	35.45	6.85	35.14
0.80	2.93	35.65	4.09	35.36
0.70	1.89	35.07	2.66	35.27
0.60	1.40	33.74	1.88	34.70
0.50	1.05	30.89	1.20	32.29
0.10	1.00	30.03	1.02	30.34