6. The method of claim 4 , further comprising computing at least one of a lower bound and an upper bound of a distribution of the local scores currently computed and wherein the decision for the document is based on the lower bound of a distribution of the local scores currently computed being above the threshold value for the estimated global score or the upper bound of a distribution of the local scores currently computed being below the threshold value for the estimated global score.
4. The method of claim 1 , wherein the decision for the document is based on the estimated global score having reached a threshold value.