A control chart pattern recognition system using a statistical ...

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J.-H. Yang, M.-S. Yang / Computers & Industrial Engineering 48 (2005) 205–221
Fig. 9. Concurrent patterns.
and concurrent patterns as shown in Table 3(a)–(d) is actually lower than those single patterns as shown
in Table 2. However, the recognition rates in Tables 3(a)–(d) are still impressive.
From Tables 3(a)–(d), we find that concurrent patterns may be confused with relative single patterns.
For example, the correct recognition number for the concurrent pattern usCut is 158 for hZ0.5
where 21 patterns are incorrectly recognized to be u.s. and 21 patterns are incorrectly recognized to be
u.t. as shown in Table 3(c). All of these incorrect recognition patterns for u.s.Cu.t. come from u.s.
Table 3a
Performance for different patterns with threshold hZ0.3
Input
Recognized pattern
u.s.
(%)
d.s.
(%)
u.t.
(%)
d.t.
(%)
cyc.
(%)
sys.
(%)
u.s.C
u.t.
(%)
d.s.C
d.t.
(%)
u.s.C
cyc.
(%)
d.s.C
cyc.
(%)
u.t.C
cyc.
(%)
d.t.C
cyc.
(%)
Normal
(%)
u.s. 73.0 0.0 0.0 0.0 0.0 0.0 27.0 0.0 0.0 0.0 0.0 0.0 0.0
d.s. 0.0 77.0 0.0 1.0 0.0 0.0 0.0 21.5 0.0 0.5 0.0 0.0 0.0
u.t. 0.0 0.0 82.5 0.0 0.0 0.0 16.5 0.0 0.0 0.0 1.0 0.0 0.0
d.t. 0.0 1.0 0.0 78.5 0.0 0.0 0.0 20.5 0.0 0.0 0.0 0.0 0.0
cyc. 0.0 0.0 0.0 1.0 87.0 0.0 0.0 0.0 3.0 1.5 0.5 6.0 1.0
sys. 0.0 0.0 0.0 0.0 0.0 98.5 0.0 0.0 0.0 0.0 0.0 0.0 1.5
u.s.Cu.t. 13.0 0.0 12.0 0.0 0.0 0.0 75.0 0.0 0.0 0.0 0.0 0.0 0.0
d.s.Cd.t. 0.0 14.5 0.0 11.5 0.0 0.0 0.0 73.5 0.0 0.5 0.0 0.0 0.0
u.s.Ccyc. 8.5 0.0 0.0 0.0 2.5 0.0 2.5 0.0 71.5 0.0 15.0 0.0 0.0
d.s.Ccyc. 0.0 7.5 0.0 1.5 4.5 0.0 0.0 6.0 0.0 69.0 0.0 11.5 0.0
u.t.Ccyc. 1.5 0.0 8.5 0.0 2.5 0.0 6.0 0.0 10.5 0.0 71.0 0.0 0.0
d.t.Ccyc. 0.0 0.5 0.0 7.0 6.0 0.0 0.0 0.5 0.0 16.0 0.0 70.0 0.0
Normal 2.2 2.3 4.8 2.9 2.4 7.0 0.5 1.2 1.4 1.4 4.1 1.9 67.9