There are no special causes of variation and the process appears to be in control at this time. Have you created a histogram and calculated capability statistics for this process?
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The process is not in control. Investigate the cause(s) of the variation and determine if effects are good or bad. For more information, select:
Declare the system stable or unstable and respond to the information on the control chart.
Are there any nonrandom patterns in the X-bar, X, or median chart?
Are there points that are out of control on the X-bar, X, or median chart?
Is there a range or sigma chart?
There are no special causes of variation and the process appears to be in control at this time. Continue monitoring the process, since variation and process shifts can occur at any time.