For a new control chart, Real-Time SPC calculates the center line and control limits from estimated process parameters. You can specify the amount of data to use for the control limit calculations.
Real-Time SPC provides several ways to change the calculation method based on which charts you want to customize. After the center line and control limits of a control chart have been calculated, they are set and locked. These lines will remain until a new calculation is initiated. For more information on control limit calculations, go to Control limit calculation details.
Open the Process Quality Snapshot which provides the process control details associated with a measure.
While it is common to use control limits that are calculated from recent data, you may prefer to find a time of stability in the process and use the historical parameters from that time to set control limits.
Open the Process Quality Snapshot which provides the process control details associated with a measure.
You can turn off the control limits for any control chart. When you turn off the limits, only Test 2, Test 3, and Test 4 are available.