So the AdCom blog says....
When we first receive an application, we evaluate an applicant’s academic record (i.e., undergraduate GPA, institution, major and course rigor; GMAT/GRE score; and, for non-native English speakers, the TOEFL/IELTS score) and an applicant’s professional experience. The rationale for looking at these two elements first is that we want to have a relatively high degree of confidence that the applicant can be academically successful in our rigorous program and will have knowledge and experience to contribute to class discussions and team projects.
The first review guides our preliminary interview invitation list. Some applicants may be placed on the list early on while others may be added later in the process. But when an applicant is placed on the interview invitation list doesn’t impact the timing of the interview invitation or the final decision nor is it an indicator of an applicant’s likelihood of being admitted. This year, interview invitations will be extended in two blocks in Rounds 1 and 2 rather than on a rolling basis, as we’ve done in the past.I think the first round interview calls directly translates into 700+ GMAT scores, high GPA and an excellent career track. Second round of interview invitation digs deeper into the essays for further filtration.