I have read on this forum on several occasions that people have seen several close LUDs, and then nothing for weeks, and then all of a sudden an approval "out of the blue." I have dealt with another US department, the Department of Labor, on many occasions. I know that the DOL has a system where a supervisor generally must give final approval following the "staff officer's" approval of something, prior to the item actually goes into effect. I was wondering if the procedure is the same at the USCIS: the adjudications officer can only make a recommendation for I-485 approval but lacks authority to give the actual final approval, while a supervisor can give the actual and final approval. That would explain the delay between multiple and close LUDs and the final aproval that many people on this forum apparenty experience. Any thoughts?