For those of you not familiar with DVOA (created by Football Outsiders), it is a method of evaluating teams, units, or players. It takes every single play during the NFL season and compares each one to a league-average baseline based on situation. DVOA measures not just yardage, but yardage towards a first down:
Five yards on third-and-4 are worth more than five yards on first-and-10 and much more than five yards on third-and-12. Red zone plays are worth more than other plays.
Performance is also adjusted for the quality of the opponent. DVOA is ranked below: 1 being the best run or pass DVOA, and 32 being the worst.