A Simple Approach for Monitoring Business Service Time Variation

Table 4

The ARL_𝑚1 of the EWMA-AM chart (𝜆₁=0.05, 𝑝_𝑚0=0.5 with ARL_𝑚0≈370).

𝑛1	𝑝𝑚1
	0.1	0.2	0.3	0.4	0.5	0.6	0.7	0.8	0.9
10	3.9	5.2	8.2	19.4	369.5	18.8	8.1	5.2	3.9
11	3.7	5.0	7.7	18.2	369.9	17.7	7.6	5.0	3.7
12	3.5	4.8	7.4	17.2	369.7	16.7	7.3	4.7	3.5
13	3.4	4.6	7.1	16.3	369.6	15.8	7.0	4.5	3.4
14	3.2	4.4	6.8	15.5	370.3	15.2	6.7	4.4	3.2
15	3.2	4.2	6.5	15.1	370.0	14.4	6.4	4.2	3.2
16	3.1	4.1	6.3	14.3	370.2	13.9	6.2	4.1	3.1
17	3.1	4.0	6.1	13.7	370.0	13.4	6.0	3.9	3.0
18	3.0	3.9	5.9	13.3	370.0	12.9	5.9	3.8	3.0
19	2.9	3.7	5.7	12.7	370.0	12.6	5.7	3.7	2.9
20	2.9	3.7	5.6	12.4	370.0	12.1	5.5	3.7	2.9
21	2.8	3.6	5.4	12.0	369.9	11.8	5.4	3.6	2.8
22	2.8	3.5	5.3	11.8	369.5	11.4	5.3	3.5	2.8
23	2.7	3.4	5.2	11.4	369.9	11.2	5.2	3.4	2.7
24	2.7	3.4	5.1	11.1	370.0	10.9	5.0	3.4	2.7
25	2.6	3.3	5.0	10.8	370.0	10.7	4.9	3.3	2.6
26	2.4	3.3	4.9	10.5	370.3	10.4	4.8	3.3	2.4
27	2.5	3.2	4.8	10.2	369.3	10.2	4.8	3.2	2.5
28	2.3	3.2	4.8	10.4	369.9	9.8	4.7	3.2	2.3
29	2.3	3.1	4.6	9.9	370.0	9.7	4.6	3.1	2.2
30	2.2	3.1	4.6	9.9	369.8	9.5	4.5	3.1	2.2