It is normally 15min to 45 min late.. I have travelled on this train about 25-30 times and 30 min. late is not much of a unusual thing.. Is treated like a passenger in Rou-Hte strech, but given the inflated time margins, it reaches not later than 12.15- 12.30 in most cases.. In any case, be assured that u will be able to catch Shatabdi..
On the D-day:
a. Be attentive to see if a train is going in Rnc direction, as taking a train towards ranchi immediately will be a great...
more... time saving move..
b. If no train is there, go outside immediately, reserve an auto not tell him to move quickly as a jam like situation occurs on staion road after Tapaswini passengers get down till next 30-45 min as there is a bottleneck on hatia station road.
c. Dont give him more than Rs. 60- 80 or at most 90..
d. Be cool as even the Hwh-Rnc Shatabdi is little bit late most of the days..
Hope this helps..