Earleir SR was Struggling with Kovai to meet its maintenance as the TAT time was way too short. A minor delay of 15-20 minutes also was impacting its return run, as it had pit slot at 23.30 to 5.30.. Now after RSA, they can have breathing space, as Incoming Brindavan will go to PM and depart as Kovai next day. Delay in Coimbatore Chennai Kovai wont hamper schedule of MAS SBC Brindavan. Infact around 1980's both had RSA apparently, later removed and Kovai was given RSA with 2677/8 (Current ERS ICE). This RSA planning was in SR's list for along time, due to mismatch in Coach composition due to AC CC , it was on hold. Now CC is same , hence continuing the RSA.