Hi.
I am trying to figure out the CpK of the process data.
However historical Dist analysis says, SHASH transform needed.
Thus I apply SHASH transformation to the data and analyze.
Here are the questions.
1. Can I use SHASH data as the material for Cpk?
2. Do I need to input SHASH value of the original LSL/USL to the Cpk analysis?
3. How can I back transform the SHASH value if presented by analysis?
4. Is there other consideration to this type of analysis?
Thank you for read.
