What to Do with a Mean & Range Chart

The continual sampling and completing of the Mean & Range Chart should be carried out as specified in the Chart headings. As monitoring of the process continues, the data should be examined for any indication that the process is displaying signs of unexpected or changing variation.

At this early stage of the Chart's completion, in this exercise, the process would appear to be in a state of statistical control because:

If you find an out-of-control plot develops, you should:

The Analysis and Interpretation of the plotted control charts is discussed in greater detail in another module of this course.