which ideally should sequence all inbound aircraft without the need of putting them to the hold. As I said, this is an ideal world and work is still ongoing.
It doesn't do anything of the sort. It simply provides real time delay figures, sequence numbers and EAT's. Nothing more. The sequencing of inbound aircraft is carried out by controllers - the hunk of bone and meat who are often forgotten about when such systems are implemented!
AMAN is supposed to give controllers more accurate information to improve planning. When it does this (for about 30 minutes total in each shift) it does help. The trouble with the system is distinguishing between accurate figures and rubbish figures - a process which often increases workload beyond that of the old system.