suppose... for your convenience arr/dep time at Durgapur is postponed by 4 hrs... fine? then ppl of Akola, Badnera, Ranchi, Bokaro, Dhanbad will have problems.
if arr/dep at Durgapur is preponed by 4 hrs then ppl of Pakur, Farakka, Malda town, Durg, Raipur, Gondia will say we have problem alighting at midnight so plz change the timetable.