IIT Bhubaneswar ECE branch hasn't yet graduated. But the average package for other departments like CSE was around 15 lpa. And around 10 lpa for Electrical Engineering. While the highest package for any branch except CSE (and few non-core branches like petroleum, geology have almost zero future scopes) was 8.5 lpa even for ECE. The average package of IIT Bhubaneswar is much above the highest package of ISM Dhanbad. If you placements are a matter of big concern for you, need not to worry as IIT Bhubaneswar has a lot of opportunities.