Started with a personality test. Once you pass that you move on to a congitive reasoning math and verbal exam online. Once passing that you get setup for a power day onsite. This consisted of a partial math reasoning exam, 2 case studies and 2 bahvioral interviews. The day is grueling and they take pride in their process. It seems that the process hinges on the case studies and I would recommend practicing as much as possible on algebra concepts as well as any case studies you can. It is a great experience but not one to take lightly.