Excel stops copying the formula when it reaches the last cell with adjacent data. Enter "=Average (C:C)-2.66*Average (A:A)" in cell D2 and copy the formula down the column to create the lower limit.

The Run chart and the Control chart are similar, but there is some difference. A Run chart will help to monitor data over time to detach shifts, trends, or cycles.

How to Interpret the Mean & Standard Deviation on a Control Chart. The extent to which products meet specifications needs to be systematically monitored in a production process.