It would be interesting to see via statistical analysis what is the ranking of indirect factors in terms of their correlation with victory. I would guess that first order factors include turnover margin, big plays, and red zone efficiency. Second order factors probably include rushing yards, sacks, missed tackles, third down efficiency, yards per play, average starting field position, etc. Third order factors probably include time of possession, passing efficiency, offensive plays, penalties, punts forced, tackles for loss, etc. Of course those are not much more than wild ass guesses.