Different league tables measure different things. You should check whether the table you're looking at actually measures the things you're interested in. They also assign different weights to the things they do measure. You should know which of the topics they cover they consider to be more important. The weightings may vary from one year to the next (often without any notice or explanation). This would affect the rankings even if nothing else had changed.
Small changes in data can make a big difference in rankings from one year to the next. Therefore, you should ideally look at a university’s rankings over time, not just for the current year.
We also recommend that you look at single-topic rankings such as the National Student Survey or the Employability Rankings. They only measure one thing, rather than bundle together different things. This generally makes them more reliable.
Most of the common rankings and league tables are compounded out of a number of single-topic rankings. Their outcomes depend on the way in which the compounding is done.
Many university league tables are compiled and published by newspapers. When you look at them, you should remember that the first priority of a newspaper is to sell a story to the public.
