The National Research Foundation of South Africa uses an international peer review system to evaluate researchers in South Africa. The B category and B2 sub-category are defined as follows:
B: Researchers who enjoy considerable international recognition by their peers for the high quality and impact of their recent research results.
B2: All or the overriding majority of reviewers are firmly convinced that the applicant enjoys considerable international recognition for the high quality and impact of his/her recent research results.
These ratings play an important part in determining the success of grant applications. They are usually reviewed once every five years. For more information, see www.nrf.ac.za/evaluation.