It is not 15 min delay usually will delay about 40-50 min between bhalarsha and ramagundam but because of slack it has been maintained on time after warangal even some times it comes before the time but when it comes to vijayawada usually delayed by 10-15 min because of lack of the platform. usually SCR delays trains betweeen kazipet and bhalarsha. Normal delay ranges from 20 min to 1 hour. It might be because of the coal fields, goods.