How to evaluate product search quality
A practical framework for evaluating product-search results: representative shopper queries, evidence checks, provenance and deliberate failure tests.
The short answer
A product-search system is useful only if it returns results that satisfy the shopper’s actual constraints, explain why they fit, and fails safely when the catalogue cannot support an answer. Measuring clicks alone will not tell you that. A practical evaluation combines representative queries, record-level evidence and explicit failure tests.
Start with the decision, not the search box
The right evaluation question is not “did the system return something?” It is “could a shopper make the stated decision from this response without being misled?” A good result has four parts: a relevant candidate, the deciding facts, a retailer destination, and honest uncertainty where evidence is missing or old.