SK is meant for non stop service, with very limited stops or in other words called as Tech stops.
But as time changed, the concept was shelved and in the same place Duronto came out which is also getting extinct to the edge.
The only living concept is AC Express n Premier Class trains.
-
Kurnool...
more... was introduced by Minister. IR was in no mood but had to FORCE it to stop.
If going by Board rules, SK should b a non stop, not a Express/SF with halts.