Really IA has been obsolete since they switched to the robocall. At that point it went from Inverse Assignment to Inverse Proffer, again to whoever could get a hold of scheduling the fastest. I don't know when IA's went away from live schedulers calling people and forcing them to work if they answered the phone, but it was before I was hired. Proffers coupled with the arrival of ARCOS has blown up the IA process, hence why there needs to be a new type of coverage step for close-in (2 hours to report or less?) rotations. 1 single callout batch in ACROS, no auto accept/acknoweldge. Done in seniority order like all the rest of our premium pay. The senior most pilot who raises their hand gets the rotation - you cannot decline an award. Declining an award is the same as no-showing any other rotation (PBS awarded, WS, SWP, etc) which would bring in CPO involvment. If scheduling had to skip coverage to get to this step then a 23M7 payment is still due.