It’s pretty easy to improve your yield at calibration for port to port il uniformity: Tell the people doing alignment to stop ignoring these failures. Of the 21 failures in your list for port to port il uniformity, 13 failed alignment. Most failed for this specific problem before anything was glued!!!
Lumentum team – We seem to have some holes in our process allowing failing units to continue through the process. Who’s going to look into plugging the hole(s)?