Abstract: A method and system for matching a basis product with products in the inventory of a provider (e.g., a retailer) that have related functionality. Characteristics of the basis product may be known from its product identifier, or may be specified. Goodness scores for candidate products may be based on similarity of characteristics with those of the basis product. Availability and consumer preferences may be taken into account in assigning goodness scores. Candidates may be drawn from those in inventory having the same type as the basis product, or a type having one or more similar functional aspects. Values of characteristics may require reformatting and/or normalization to facilitate comparison. A list of candidates, ranked by goodness scores, may be prepared.