I would like to get some feedback on whether you can use ppm to calculate Rolled Throughput Yield (RTY) Loss instead of %. I am not asking for how to convert RTYL% to PPM but I am more interested from a process stand point. Would you calculate Throughput Yield (TY) for each process, calculate RTY then RTY Loss (1-RTY) then convert to ppm. Or is there another way to capture that? Is there a risk of making this a ppm measure? can the numbers be misleading ? Thank you in advance !!!