Abstract: Disclosed are methods, apparatuses and computer instructions for generating groups of articles for ensembles based on an anchor article. In one aspect, the method includes adding attributes of the anchor article to a set of selected attributes, defining a sequence of buckets in an order where each of the buckets includes available items in one or more categories based on a category of an anchor article, and generating a current group of articles by performing the following steps until each bucket has been selected: selecting a bucket in the sequence, applying a filter to remove items having attributes incompatible with the set of selected attributes, calculating weights for articles based on one or more rules and the set of selected attributes, selecting an article from the bucket for a group of articles based on its weight, and adding attributes of the selected article to the set of selected attributes.