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Which of the following statements regarding control charts is​ best?

A. The upper and lower limits of a control chart should be identical to the upper and lower tolerance limits for the manufactured part.
B. Control charts should be used regardless of the state of control of the process.
C. Control​ charts, by​ themselves, will improve quality levels.
D. Control charts are used to distinguish whether the process is operating normally or requires attention.

1 Answer

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Final answer:

The correct statement regarding control charts is D. Control charts are used to distinguish whether the process is operating normally or requires attention.

Step-by-step explanation:

Control charts are used to distinguish whether the process is operating normally or requires attention.

Control charts are graphical tools used in statistical process control to monitor and analyze the performance of a process over time.

They help identify whether a process is in control, meaning it is operating within acceptable limits, or if there are any special causes of variation that require investigation and corrective action.

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