The evaluation criteria of university ranking lists are different. Methodology, used indicators and data on which indicators are based on vary as well as the weighting of indicators in evaluations. In the subject rankings or field rankings attention should be paid to the fact that the classification of publications to the disciplines is not congruent in the databases like Scopus and Web of Science. Besides bibliometrics other evaluation criteria are the ratio of students and staff, the quality of teaching and reputation surveys. Results between ranking lists should not be compared. Benchmarking should only be done between different years in regard to the same ranking.
Some of the ranking lists evaluate only universities, some also research institutions and hospitals.
JCR/Web of Science
Other databases and resources
The most well know ranking list of world universities is the Shanghai Academic Ranking of World Universities (ARWU) published by ShanghaiRanking Consultancy. Rankings for universities and subjects available.
"ARWU uses six objective indicators to rank world universities, including the number of alumni and staff winning Nobel Prizes and Fields Medals, number of highly cited researchers selected by Clarivate Analytics, number of articles published in journals of Nature and Science, number of articles indexed in Science Citation Index - Expanded and Social Sciences Citation Index, and per capita performance of a university. More than 1800 universities are actually ranked by ARWU every year and the best 1000 are published."