that team grades players.
Tanny is not sitting in a meeting watching film and grading a CB coming out of his backpedal. He is a manager.
Rex does the same with his coaches. They review NFL film and based on that and seeing them perform rank available FA. They also meet with the college players that were identified as fits at the combine and pro days. They then assign a grade to those players that were previously graded by the personnel dept. Rex also ranks in critical order the positions most in need.
Rex, tanny and Bradway then hash out the different grades on the same player and set the board. Rex lets the GM know what positions
Tanny is not sitting and watching film and grading a CB on his transition out of his backpedal.