Correlate (A) to (B) for all of process control and decide the target value which is SPC Ave. center
After we adjust it in +/-1sigma so-called profile control value at the level of component forming(A),
we can start the production not to wait for Assy result(B) (KPIV control guarantee backward process)
We might be changed the SPC target value(Profile control value) in the long term SPC review