Systems and methods of item set generation in an electronic catalog

A method comprising:

• determining, at a server, pairwise scores for items in an electronic catalog that is stored in a storage device communicatively coupled to the server;
• determining, at the server, when a pair of items in the electronic catalog is valid by:
• determining substitution groups based on the pair of items;
• determining that the substitution groups that each item belongs to form sets with each other;
• determining, at the server, a sum of the pairwise scores by activity type for a plurality of activity types;
• summing, at the server, the pairwise scores for the plurality of activity types;
• generating, at the server, a sorted list of items that compliment an anchor item of the electronic catalog;
• filtering, at the server, items from the generated sorted list;
• adjusting, at the server, an item ranking in the filtered list;
• determining, at the server, consistency between recommendations of the items in the adjusted ranking list;
• and
• selecting, at the server, final recommendations of the items based on the determined consistency between recommendations, and transmitting the selected recommendations for display.