Why are good institutes like IIIT-Hyderabad, IIIT-Allahabad, BITS-Pilani, NSIT and DTU missing in MHRD Rankings for best engineering institutes?

The first-ever ranking of higher education institutions in India namely the Engineering, Management, Pharmacy, and Universities was released on the 4th of April 2016, by the MHRD. Many claimed that the report was misleading as they did not conduct thorough research before ranking the institutes. 

Firstly, only 233 out of 720 universities participated and it's highly possible that some of the major colleges did not participate in the survey. So to get an exact picture, 100% participation is a must. One of my friends told me that his institute was a tier-3 institute with pathetic teaching faculty and placements and yet was ranked under 70. This alone is enough to point out that fallacy in the rankings. He also told me that most of the duvet conducted was done with false credentials, therefore, discrediting the rankings.
The worst part of these MHRD rankings is that the accuracy and authenticity are in the hands of the institute which can be easily manipulated. Overall I believe that The National Institutional Ranking Framework is a good idea, but poorly executed because the rankings are done on the basis of incomplete data and are often manipulated. Unfortunately, many students fall trapped in these inflated rankings and end up h choosing the wrong institute.