Understanding Relevance Metrics: NDCG, Precision, and Hit Rate

girijesh s. · 2025-12-03 07:39:34.308329+00

Hello, Any documents on relevance ndcg, precision and hit, explaining what it is?

NDCG (Normalized Discounted Cumulative Gain): Measures the ranking quality of retrieved documents, considering the position of relevant documents. Higher scores indicate better ranking. Source.Precision: Fraction of relevant documents among the retrieved ones. Higher precision means more relevant documents were retrieved. Source.Hit: Indicates if at least one relevant document was retrieved. A hit rate of 1 means at least one relevant document was found. Source.Would you like more detail?Sources: - https://github.com/arize-ai/phoenix/blob/main/src/phoenix/metrics/retrieval_metrics.py

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