Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3
3 1
Test Value
50.2 51.8 49.3
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
3
1
4
1
2
The summing procedure continues until falls on the apposite side of the centerline, the score accumulation process ends and a new one begins. For the third value (49.3), a zone score of 1 is assigned since this result is no longer on the same side of the centerline as the preceding one.
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
Test Value
50.2
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
Test Value
50.2
53.0
8
52.0
4
2
51.0
1
1
50.0
1
49.0
2
48.0
4
47.0
8
The value of 50.2 is made in the zone between the target (50.0) and the 1-sigma limit (51.0). A score of 1 is assigned.
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3 48.5
3 1
1
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3 48.5
3
1
1
2
3
5
Test Value
3
1
1
4
1
5
6
3
7
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3 48.5 50.0 49.0 49.3 48.5
3
1 4
1
5
6
3
Test Value
50.2 51.8 49.3 48.5 50.0 49.0 49.3 48.5
Zone Control Chart
前题
(2) Stable
.
. ..
.
..
UCL
.
. . . . CL
LCL
(2) 稳定的
已经达到稳定
Test Value
+3 sigma 8
+2 sigma
4
2
+1 sigma
1
Target
1
-1 sigma
2
-2 sigma
4
-3 sigma
8
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3 48.5 50.0
3 1
1 3
Test Value
50.2 51.8 49.3 48.5 50.0
53.0
8
52.0
4
2
3
51.0
1
1
50.0
1
1
1 44
49.0
2
3
5
48.0
4
47.0
8
If a value falls exactly on the centerline, zone score of 1 is added to the previous cumulative score. This situation occurs for the fifth result of 50.0.
53.0
8
52.0
4
2
3
51.0
1
1
50.0
1
49.0
2
1
4
5
67
3
8
48.0
4
47.0
10
8
A zone score 8 or more is a signal that the process has been out of control. This is illustrated by the last value of 48.5 listed in the example. Following corrective action, the scoring process begins anew.
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3 48.5 50.0 49.0 49.3
3 1
4 1
5 3
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3 48.5 50.0 49.0 49.3
2
1
1
4
5
5
3
6
48.0
4
47.0
8
If a value falls exactly on one of the other zone lines, the rule is to give the process the benefit of the doubt. The lower zone score is used. Note that, for the sixth result of 49.0, the zone score of 1 makes the cumulative score to 5.
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8 49.3 48.5 50.0 49.0
3 1
4 1
3
Test Value
50.2 51.8 49.3 48.5 50.0 49.0
53.0
8
52.0
4
2
3
51.0
1
1
50.0
1
49.0
Test Value
53.0
8
52.0
4
2
51.0
1
50.0
1
49.0
2
48.0
4
47.0
8
50.2 51.8
1
Test Value
50.2 51.8
53.0
8Leabharlann 52.04251.0
1
50.0
1
49.0
2
48.0
4
47.0
8
5
3
12
The second value (51.8) is in the 1-sigma to 2-sigma zone. A score of 3 is assigned, which is the sum of the score for this zone and the previous one.