Find what action should be taken?
While conducting process capability study on a pilot run of 50 units, it was found that the Cpk upper value is 1.7, while the Cpk lower value is 0.80 . The requirements given by the customer expects the minimum value of Cpk to be 1.25. What action should be taken?
OPTIONS
- Reduce variability
- Contact customer and change specification
- Change the process
- Center the process
ANSWER
Center the process
EXPLANATION
From the data, it is obvious that the Cpk upper and lower values are away from each other; this typically occurs when the process is not centered and the mean is skewed toward upper or lower limit. In this case it is skewed towards lower limit. The first and immediate solution is to center the process to ensure mean is centered.
