Question: Process Control: c - chart Out of Control Conceptual Overview: Explore how c - charts are used to detect processes out of control based on

Process Control: c-chart Out of Control
Conceptual Overview: Explore how c-charts are used to detect processes out of control based on the number of defects.
This c-chart shows a process that goes out of control. At about the 12th or 13th sample, the average number of machine failures more than doubles. Click on the graph to generate a new set of 25 samples. Can you see the signs that the process is out of control in the second half of the samples? Sometimes it is difficult.

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