Defining Control Tests
To define control tests, use the Control Tests component (QS_CL_TEST). This topic discusses how to define control tests.
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Page Name |
Definition Name |
Usage |
|---|---|---|
|
QS_CL_TEST |
Define tests for detecting loss of process control. Test violations are reported as alarms and noted on control charts. |
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Copy Configuration Item Page |
QS_COPY0_PNL |
Creates a new control test by copying an existing control test. |
Use the Define Control Test page (QS_CL_TEST) to define tests for detecting loss of process control.
Test violations are reported as alarms and noted on control charts.
Navigation:
Field or Control |
Description |
|---|---|
|
Click the Copy From button to create the new control test by copying from an existing control test. When you click this button, the Copy Configuration Item page appears. |
Test Prototype
Field or Control |
Description |
|---|---|
Prototype |
Select the pattern to use for performing tests for special causes of variation. This is also known as the Western Electric rule type. |
Pattern Example |
Displays a cursory illustration of the pattern that is tested. |
Note: The prototype illustration is standardized and is not adjusted based on the number of tested or trigger points that are entered for a specific control test.
Apply To
Select which subchart (Chart 1 or Chart 2) within a control chart to apply the test to. This enables alarming distinction between means and variance tests.
Sensitivity
Field or Control |
Description |
|---|---|
Trigger Points |
Enter the number of points (subgroups) in violation that are necessary to trigger the alarm. |
Tested Points |
Enter the overall number of plotted points (subgroups) that are to be tested. For example, if the Trigger Points value is 3 and Tested Points is 6, then it takes three subgroups out of six in violation of the pattern to trigger the alarm. |