Approving a group purchase request for a group of articles. A sub-group of articles is selected, wherein a unique article approval index is assigned to each of the articles and a highest article approval index is determined among the unique article approval indexes of the articles of the group, wherein the article of the group is selected into the sub-group if the article of the group complies with at least one of following article selection criteria: the unique article approval index of the article of the group is above a predetermined approval index threshold and the unique approval index of the article of the group is equal to the highest article approval index; approving the group purchase request for the group if the group purchase request for the sub-group is approved; and rejecting the group purchase request for the group if the group purchase request for the sub-group is rejected.
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