1. What makes a process in-control or out-of-control according to SPC?
2. Control charts for attributes need ____data and control charts for variables utilize______ data.
3. Tell three of the four sources of variation with a description giving examples to explain each source
4. What are the three main categories of variation?
5. For each of the following charts, explain what is plotted on the chart and the purpose of plotting that particular data (what information is gained).
X-bar Chart
R chart
S chart
S ** 2 chart