Glossary TermRichnessClick to reveal
Definition
The share of documents in a population that are actually responsive.
Why it matters: Low richness changes sample sizes, expectations, and review cost.
Vocabulary
A plain-language glossary for TAR, sampling, and defensibility.
Use this as a fast reference for common terms that often get conflated in stakeholder discussions.
Reference cardsMaster these core TAR concepts to communicate more clearly with stakeholders. Click a card to reveal its definition.
Glossary TermElusionClick to reveal
Definition
A sample-based estimate of what responsive material may remain in the unreviewed set.
Why it matters: It informs stopping decisions but never proves a perfect review.
Glossary TermControl SetClick to reveal
Definition
A fixed reference sample used to compare workflow behavior over time.
Why it matters: Helpful in some workflows, but weak design can mislead.
Glossary TermRecallClick to reveal
Definition
The share of truly responsive documents that were found by the workflow.
Why it matters: Often the headline metric in defensibility discussions.
Glossary TermPrecisionClick to reveal
Definition
The share of documents marked responsive that were actually responsive.
Why it matters: It affects cost and reviewer burden more than completeness.
Glossary TermSampling ErrorClick to reveal
Definition
The uncertainty introduced when a conclusion is based on a sample instead of the full population.
Why it matters: It is the reason confidence intervals exist.