1. Cut-Minimize Rake count by working out on Rake schedule & connect it to most likely Train!!
2. Offer train to station without PM/SM/Pit-Line facility by RSA (Padmavat Exp RSA FD-DLI Exp, PM at FD)!!
3. Quick return of train at PM Depot slot, in case no Slot exist for SM at Terminating Station!!
RSA has nothing to do with Pit-Lines or Maintenance, as...
more... Rake will undergo PM as per KM/Return Cycle & SM as per TAT & Station Slot!! Many Non RSA Rake don't visit Pit-Lines while many RSA Rake does!!