A credible source once told me that business schools, especially the top ones, use algorithms to score and select /eliminate at the first go ...and then human reviewers take over. These schools receive around 10,000 applications every year, and it is not possible for them to individually read each application, let alone rank them. The GPA, GRE (or GMAT) becomes part of the algorithm, and applicants are stratified into pools e.g. bankers, consultants, human resource backgrounds, etc. Of course, education schools (such as HGSE) or even Harvard University may operate differently.