Control charts are never implemented until special cause variation has been detected in a process.

Question

Quizplus · Accepted Answer

Control charts can be implemented to monitor and improve a process even if no special cause variation has been detected. In fact, it is recommended to use control charts as a proactive measure to prevent special causes from occurring. Control charts can help identify common cause variation and allow for process improvement.

Control Charts Are Never Implemented Until Special Cause Variation Has