Decoder. plain-English AI glossary

Retrieval Quality

● Core

Also called Retrieval Effectiveness

How good your search actually is at surfacing the right stuff — the ceiling on any RAG answer.

Think of it like

A cook can only be as good as the ingredients delivered; bad groceries, bad dinner.

Example

A RAG bot gives wrong answers not because the model is dumb but because retrieval keeps handing it the wrong paragraphs.

How it actually works

Retrieval quality is the composite of recall, precision, and ranking — do the right passages show up, and near the top? It is the most common and most overlooked failure point in RAG: teams tune prompts for weeks when the real problem is that the relevant chunk never gets retrieved. Measuring it with real queries is the fastest way to find where a system is actually broken.

For product teams

Fix retrieval before blaming the model; it is usually where quality problems really live.

For engineers

Aggregate of recall@K, precision@K, and rank position; the upstream bottleneck for grounded generation.

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