Q. Describe how to assess the capability of any process to meet its requirements and stay within predefined specification limits.
State the different choices of control chart available and the preferred system used by the process industries.
Q. For a given process, the upper specification and lower specification limits are set at 2.549 and 2.503 respectively. If the standard deviation for this process is 0.0036 and the mean is 2.530, calculate the following indices.
(i) Process capability index Cp.
(ii) Process capability index CPk.
Using your results, make recommendations as to whether this process is capable, and likely to meet its specification requirements. What are the relative advantages of the two types of process capability index?