The QS World University Rankings is an annual publication by the British institution Quacquarelli Symonds (QS), specializing in education. This ranking aims to classify and assess global universities based on various criteria and factors. It is considered reliable, with an approximate 99% trustworthiness according to independent estimates.

The QS ranking relies on six main factors to evaluate universities:

1. Academic Reputation (40%): It assesses the university's reputation among other academics.

2. Employer Reputation (10%): The university's reputation is estimated based on the success of its graduates in obtaining job opportunities.

3. Faculty-Student Ratio (20%): It evaluates individual attention to students through the ratio of faculty members to students.

4. Research Citations per Faculty (20%): It is based on research publications and citations coming from the university.

5. International Faculty Ratio (5%): It evaluates the diversity of international academic staff at the university.

6. International Student Ratio (5%): It assesses the diversity of international students who enroll in the university.

These factors come together to provide a comprehensive ranking of universities worldwide, helping students and researchers choose the right university to meet their needs and interests.