Why is IISc constantly slipping on QS rankings?

The QS Ranking 2018 suggests the Indian Institute of Science (IISc), a premier research-based institute in Bengaluru, has been slipping in the rankings of the world’s top universities for three years. IISc was ranked 142 in 2016 and 152 in 2017. Its current ranking is further down at 190. An analysis by Business Standard suggests IISc slipped in the rankings mainly on account of an alleged decline in academic reputation. The institute has been scoring less on academic reputation and faculty-student parameters. IIT-Bombay sprung a surprise by getting into the top 200 for the first time. Its scores on different