Process capability analysis should be used only after ________.
A)control charts indicate that all special causes have been eliminated
B)control charts show that the process is out of control
C)common and special causes are known
D)a plan for getting the process under statistical control has been agreed upon

Question

Quizplus · Accepted Answer

Process capability analysis should only be performed after all special causes of variation have been eliminated, and the process is under statistical control. This ensures that the data used for the analysis are representative of the process's natural variation. The other options are not correct because process capability analysis cannot be performed when a process is out of control, and it is not necessary to have a plan to get the process under control to perform the analysis. Common and special causes are known is not necessarily a requirement for process capability analysis, but it does help in understanding the sources of variability in the process.

Process Capability Analysis Should Be Used Only After ________