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Glossary

Mass tort & MDL terminology

Plain-language and authoritative legal definitions for every core mass tort term.

Multidistrict Litigation (MDL)

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A federal procedure that consolidates civil cases sharing common factual questions before a single judge for coordinated pretrial proceedings.

Bellwether Trial

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A representative test case tried early in an MDL to gauge jury reactions and inform settlement valuation across the remaining inventory.

TortSignal Score™

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A 0-100 composite score measuring mass tort momentum and attorney opportunity using plaintiff filings, defendant exposure, bellwether proximity, and science strength.

Plaintiff Steering Committee (PSC)

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An attorney leadership body appointed by an MDL judge to manage discovery, motion practice, and bellwether trials on behalf of all plaintiffs.

Judicial Panel on Multidistrict Litigation (JPML)

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The seven-judge federal panel that decides whether to consolidate related civil actions pending in different federal districts into an MDL.

Daubert Hearing

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A pretrial proceeding in which the court evaluates whether proffered expert testimony meets reliability and relevance standards under Federal Rule of Evidence 702.

Mass Tort

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A civil action brought by many plaintiffs against one or a few defendants for harm caused by a shared product, exposure, or course of conduct.

Statute of Limitations

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A jurisdiction-specific deadline by which a plaintiff must file suit; in mass torts, often triggered by the discovery rule.

Punitive Damages

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Damages awarded beyond compensatory amounts to punish a defendant for willful, malicious, or reckless conduct and to deter similar future conduct.

Settlement Fund

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A pool of money agreed to by a defendant to resolve claims in a mass tort, typically distributed through a points-based matrix to qualifying plaintiffs.

Discovery

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The pretrial process by which parties exchange documents, written answers, depositions, and expert reports to develop the evidentiary record.

Class Action

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A lawsuit in which one or more named plaintiffs sue on behalf of a class of similarly situated persons under Federal Rule 23.