Confidence measures how often one product appears when another product is purchased. For products X and Y, compute the number of purchases containing both and divide by the number containing Y; use the result to quantify their association. section 5.1
Use confidence to support a simple product-grouping and recommendation workflow:
- Count purchases in which products occur together. section 5.1
- Divide the joint-purchase count by the purchases containing the comparison product. section 5.1
- Set a confidence threshold for merging strongly associated product groups, then recommend the strongest associations. section 5.1
Product recommendations
An online store can identify frequent pairings such as laptops with external disks or tennis rackets with tennis balls. When a customer adds a related item, it can suggest a strong associated product. section 5.1
