The Indian School of Business (ISB) has been accredited by the EFMD Quality Improvement System (EQUIS) and re-accredited by the Association for Advancement of Collegiate Schools of Business (AACSB). With this, Hyderabad-based ISB joins the league of just about a hundred select business schools worldwide that have both AACSB and EQUIS accreditations. “The accreditations are an endorsement of the calibre of our outstanding faculty, alumni, students and staff, ’’ Rajendra Srivastava, Dean, ISB, said in a release issued here on Wednesday.