1分:Good GRE (e.g. 1300 or 309); good GPA (e.g. 3.5); expecting master's degree; rich experience with co-authored papers; strong letters; seems to be motivated.
2分:Average GRE (e.g. 1250 or 312); okay TOEFL; excellent GPA (e.g. 3.8) from a top school in China; some preliminary experience; strong letters; wants to be a professor.
3分:Excellent GRE (e.g. 1400 or 322); average GPA (e.g. 3.1) with many Ws (withdraws) and D in chemistry; some experience; letters are so so. Discuss.
4分:Average GRE (e.g. 1150 or 304); average GPA (e.g. 3.1); no experience; letters are okay; nothing stands out.
5分:Outstanding GRE (e.g. >1400 or >322); poor GPA (e.g. 2.8); no experience; luke-warm letters; not sure what the applicant wants to do afterwards.
Triage Reject:unacceptable GRE (e.g. <1000 or <300, or AW<2.5), or unacceptable GPA (e.g. 2.8), or absolutely no experience, or letters indicating a psychological problem, or poorly written PS, or any combinations of them.