Table 8.

The ${\mathit{ARL}}_{2HEPD}\text{and}{\mathit{ASS}}_{2HEPD}$ values of proposed CC using HEPD when its shape parameter is shifted using $r_{\mathit{oHEPD}}=370\text{and}n=20$.

	$\lambda =2$		$\lambda =4$
Control limits$\to$	${\mathit{UCL}}_1=$ 12.953 ${\mathit{LCL}}_1=7.347$	${\mathit{UCL}}_2=$ 12.328 ${\mathit{LCL}}_2=7.973$	${\mathit{UCL}}_1=$ 11.5427 ${\mathit{LCL}}_1=$ 6.8149	${\mathit{UCL}}_2=$ 11.4215 ${\mathit{LCL}}_2=$ 6.9361
Control coefficient $\to$	$W_1=$ 1.2538	$W_2=$ 0.9740	$W_1=$ 1.0607	$W_2=1.0064$
Truncated constant $\to$	$q_1=0.8602$		$q_1=0.8562$

$r$	${\mathit{ARL}}_{2HEPD}$	${\mathit{ASS}}_{2HEPD}$	${\mathit{ARL}}_{2HEPD}$	${\mathit{ASS}}_{2HEPD}$
1	373.85	24.84	373.27	24.81
1.1	172.14	24.84	142.46	24.81
1.2	109.37	24.85	86.16	24.82
1.3	79.01	24.86	61.03	24.83
1.4	61.23	24.86	46.92	24.84
1.5	49.63	24.87	37.96	24.84
2	24.50	24.91	19.22	24.88
3	11.68	24.96	9.98	24.91
4	7.71	24.98	7.12	24.92
5	5.87	24.97	5.78	24.91