These settings apply only to the control charts for this measure. To change the system default preferences, go to Control chart preferences.
Enter a value to use as the same subgroup size for all samples of the data collections.
The control chart type and subgroup size must be the same at each station of the measure.
If you have a defective type that you want to monitor on its own control chart, you must set it up as a defective measure. If you have multiple defective types that you want to monitor together, aggregated on a single control chart, you must set it up as a grouped defective. For more information, go to Quality attributes.
Control limits are the horizontal lines above and below the center line that are used to judge whether a process is out of control. The upper and lower control limits are based on the random variation in the process. By default, the control limits are displayed 3 standard deviations above and below the center line.
To focus the scope of the station dashboard, Engineers can hide or display control charts for each measure. For each control chart, use Display on station dashboard to display all the charts, only the first chart, or no charts.
This setting affects only the display on the station dashboard. All charts for the selected control chart display on the Process Quality Snapshot.
Real-Time SPC provides eight tests for special causes for control charts with continuous data and four tests for special causes for control charts with attribute data. Use the tests to determine which observations to investigate, and to identify the specific patterns and trends in your data. By default, Real-Time SPC uses only Test 1. Select additional tests based on company or industry standards.
To learn about the test options or to change the test preferences for all control charts, go to Control chart preferences.