On the Charting Procedures: 𝑇² Chart and DD-Diagram

Table 1

Out-of-control observations detected by DD-diagram.

Obs.	𝑋1	𝑋2	𝑋3	𝑋4	𝑋5
#	[0.965, 1]	[6.75, 8]	[0.115, 0.135]	[100, 115]	[430, 470]
2	0.991	7.956	0.113	105	454.60
3	0.982	7.900	0.114	101	454.30
19	0.996	8.000	0.117	101	456.13
27	0.987	7.850	0.114	102	453.00
29	0.999	7.950	0.114	107	452.10
33	0.991	7.951	0.113	109	454.21
39	0.993	7.950	0.115	111	454.00
43	0.996	7.940	0.114	109	453.88
50	0.982	7.959	0.111	106	454.12
52	0.987	7.940	0.113	107	455.00
54	0.987	8.010	0.115	106	450.10