Figure 12.5 Complete XmR chart for 8-Shoe Trials

Taken together the X-chart and the mR-chart are called an XmR chart.

From the results in Figure 12.5, we could expect to occasionally see a result as high as 122.80 or a result as low as -104.36 over an 8-shoe trial under the specified conditions. However, should there be a value lying outside the limits, then we will want to investigate further.

 © 2009 Norman Wattenberger