sampling to track yield improvments
I am looking to validate impact of process changes on yield at the step. My proposal was to track yield for 1000 samples surrounding the change, 500 pre & 500 post. Are there any benefits to separating the 500 units in each group into 5 sequential groups of 100 each and analyzing these as subgroups? Does this answer change based on the baseline yield (mid range ~60% vs high-95% + yields)