Michigan Algebra II KHauck

In order to make a control chart, follow the procedure below:

1. Collect your data.
2. Plot the center or mean; it is usually the target value for the data set.
3. Plot the upper and lower control limits usually the mean plus/minus three times the standard deviation.
4. Plot data points collected.
5. Look for "out-of-control signals" on the control chart. When one is identified, mark it on the chart and investigate the cause.