freshness

Baidu Intelligent Testing

Jun 8, 2016 · Fundamentals

Evaluation Framework for Search Retrieval Systems: Speed, Relevance, Recall, and Freshness

The article introduces a four‑dimensional evaluation framework for retrieval systems—Fast, Accurate, Complete, and New—explaining how each metric is measured, why it matters to users, and how crowdsourced testing across devices and networks can provide objective quality assessments.