The MBA is the premium product of the world’s leading business schools. It is also regarded as the passport to management and career development. But the business qualification is a rather more complex item than many might imagine. For example, there has been a burgeoning of MBAs, of varying qualities and rigour. So companies need to apply their own selection criteria to ensure they recruit the best qualified executives. The ranking tables provide an important aid to this selection process, but even their methodologies need to be well understood.