Its essence: Entry-level coaching assistants are responsible for weekly breakdowns of the upcoming opponent, handed in to Belichick more than a week in advance of the game so he can use them as reference points as he conceives a strategy.
This is a total Belichick move. If you read Education of a Coach, it goes over how Belichick got his start in the NFL as an assistant coach in Detroit (iirc) who would breakdown game-film for the opponent that they'd be playing the week-after-next; in order to get a head-start in the upcoming game-plan.