The Indian Railway Traffic Services (IRTS) has two functions:
(a) Commercial Transportation of objects by trains is the responsibility of the Commercial Division of the IRTS.
(b) Operations: The Operations Department is in charge of the movement of trains.

The hierarchy:
Assistant Superintendent(Commercial/Operations) at Divisional Headquarters and after 4 years of service at the senior scale > Commercial/Operations Superintendent at the Divisional Headquarters > Senior Divisional OS/CS > Chief Commercial Superintendent OS/CS > Additional Chief Commercial Superintendent OS/ CS > Deputy Chief Commercial Superintendent OS/CS.