An R value of zero (on a range chart)means that the process must be in control since all sample values are equal.

Name: An R value of zero (on a range chart)means that the process must be in control since all sample values are equal.
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An R value of zero could indicate that all sample values are equal, but it doesn't necessarily mean the process is in control. It could also indicate issues like improper data collection or a lack of process variability detection.

An R Value of Zero (On a Range Chart)means That