The selection process at various colleges differs but primarily includes a Written Ability Test (WAT) and a Personal Interview (PI). The weight age of CAT score too is not uniform at all the IIMs. It ranges from 20% at some most prominent college to 80% at the newest IIMs.
Previous academic records of the candidates, relevant work experience and other similar inputs play vital role during short listing and ranking of candidates at various stages. For precise details, one may refer the admissions policies on respective IIM’s website.