Process capability can be addressed when:
A) assignable causes are present.
B) a process is in statistical control.
C) a process is in statistical control but assignable causes are present.
D) the nominal value equals the tolerance regardless of assignable causes.

Question

Quizplus · Accepted Answer

Process capability analysis measures whether a process is capable of producing output within the specified tolerance limits. It is only meaningful to conduct process capability analysis when a process is in statistical control, meaning that the variation is due to inherent factors in the process, as opposed to assignable causes such as machine malfunctions, variations in raw materials, or operator errors. If assignable causes are present, the process is not stable, and process capability analysis would not be useful. If the nominal value equals the tolerance, it would indicate that the process is performing as expected, but it does not mean the process is in control or capable.

Process Capability Can Be Addressed When