Pour chaque position i (en partant de 1) dans le U-Net, le score d'utilité de chaque candidat est calculé en utilisant l'Équation 5.8 et en prenant en compte des utilisateurs du U-Net aux positions 1, ..., i?1 ; étant donné i, si le meilleur candidat a un score d'utilité supérieur à celui de l'utilisateur U-Net u [i], alors cette étape se termine (ligne 6) Si plusieurs candidats obtiennent le meilleur score, le choix se fait de manière aléatoire. Dans la Figure 5.2, v 7 est plus utile que v 3 à la troisième position dans le U-Net car ,
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