....Bare in mind RFA's are not used in SA - yet!....
Chook, the NSW RFA system was used has a basis for the current SES SOC system. Started about two or three years ago. I believe the process is very similar.
For example, the SA SES Request for Assistance database produces the tasking form that can be facsimiled or emailed if required.
In the case of last Tuesday, instead of all SES local HQ's in Adelaide opening, the Regional (eg Central & North) and State Operations centres handled the resource tracking, sitreps, etc. Central Region and State operations centres are in the one room now. MFS and CFS liason officers were present during part of the day.
Then later in the day some Adelaide SES LHQ's opened to handled localised suburbs of damage. This kept more people & trucks on the road.
More formalised AIIMS structure is the future when training completed.