There will be multiple stages, and the initiates will be ranked in order to determine who will get first pick of jobs after initiation. Only the top ten initiates are made full members of Dauntless. If they get cut, they must live factionless. That night an initiate from Candor, Al, breaks down and cries in the dorm.
How many make it into dauntless
From the book divergent
How many make it into the cut