IDS IDS-iSYS

The rules to apply are selected for each test in the 6 rules defined as follows:
1
2s
One control measurement exceeds the limits of x ± 2s.
This rule provides a WARNING and an additional inspection with the other rules.
1
3s
One control measurement exceeds the limits of x ± 3s. This rule is sensitive to random
errors.
The run is judged to be OUT OF CONTROL.
2
2s
Two consecutive measurements within the run exceed the same limit either x - 2s or x + 2s.
This rule is sensitive to systematic errors.
This rule is applied to the same control level or on different control levels:
one measurement of each control exceeds the same limit.
The run is judged to be OUT OF CONTROL.
R
4s
The range between the high and low control measurements within a run exceeds 4s. This
rule is sensitive to random errors.
This rule is applied on the same control level and on different control levels: one
measurement exceeds the +2s limit and the other exceeds the -2s limit.
The run is judged to be OUT OF CONTROL.
4
1s
4 consecutive control measurements within or across a run exceeds the same limit, either x
- 1s or x + 1s. This rule is sensitive to systematic errors.
This rule is applied on the same control level or on different control levels:
4 consecutive measurements across control levels exceed the same limit,
either x - 1s or x + 1s.
The run is judged to be OUT OF CONTROL.
10
x
10 consecutive control measurements fall on one side of the mean. This rule is sensitive to
systematic errors.
This rule is applied on the same control level or on different control levels
The run is judged to be OUT OF CONTROL.
Rules Inspection:
The rules defined in the set-up test will be tested in the following order:
Control
data
1
2s
1
3s
In control -> Accept run
R
4s
4
1s
10
x
Out of control -> reject run
Yes
No
Yes
Yes
Yes
Yes
Yes
No
No
No
No
No
2
2s
Use
3-13- Quality Control Management (continued)
IDS-iSYS User Manual - Revision M1!
Use 3-13
99
Software version V 14