Astrid's system was straightforward but effective. He created a table with two columns: one for the role and the other for the actor he deemed the best fit. Whenever he watched a promising performance, he jotted down the actor's name in the corresponding row. If another actor later outperformed them, he replaced the name with the new contender. He repeated this process meticulously, ensuring that each role was matched with the strongest performance by the time he finished reviewing all the auditions.