It starts with the OL play and blocking schemes. Except on goalline, the OL rarely fire out and attack the DL, but typically stand straight up (or take a step back) and sheild. They do pull down the line and search for defnders and they all run laterally don the line in unison, but rarely fire out and almost never try to create a specific, pre-assigned hole. In this offense, they are assigned to shield and the back is responsible for finding a crease and running through it. The reason the team uses slow developing run plays, draws and the like where the back is standing still or slowly moving sidways is to give them time to find that crease. The best aspect of this scheme is that it is very difficult for the defense to immediately discern between a run and pass and with no specific person a lineman is responsible for, there is less chance for twists an stunts to blow the play's blocking ability.