Ediscovery for Mass Tort Litigation: Challenges and Best Practices

When a company gets hit with a mass tort, ediscovery changes overnight, with the volume, speed, and stakes spiking all at once. The legal team is no longer handling a single lawsuit with a handful of custodians. Hundreds or thousands of plaintiffs are filing claims across different courts, all pointing at the same product, device, or decision.

In a standard lawsuit, discovery has a clear beginning, middle, and end. Mass torts don't work that way. The data volumes are massive, the requests never stop coming, and a single mistake in one case can echo across the entire docket. Managing this chaos requires shifting away from the usual discovery workflow and building a centralized strategy designed for scale. 

This article walks through the differences, the traps to avoid, and the best practices for maintaining efficiency and consistency in ediscovery for mass tort litigation.

How mass tort litigation differs from other ediscovery matters

Single-matter discovery is a straightforward march: scope custodians, collect the data, and run the review. Once a team completes production, they are usually home free.

Mass tort litigation blows up that linear path. Instead of dealing with one opposing counsel, teams will face dozens of plaintiff law firms operating across multiple state and federal courts. They will coordinate with each other, share strategy, and file continuous waves of discovery requests. 

That means discovery isn't a one-time event. It's a running engine that stays on for years. Every document produced, every privilege tag applied, and every redaction made will be scrutinized by teams of attorneys across multiple jurisdictions. If a defense team takes a position in a state court case on Tuesday, the plaintiffs' steering committee in the federal Multidistrict Litigation (MDL) will inevitably ask about it on Thursday.

Core challenges in mass tort ediscovery

Defense counsel managing mass torts face a unique set of operational hurdles. When doing discovery across an entire docket, the usual pain points become exponentially harder to control.

Data volume

The sheer volume of data in a mass tort can be staggering. Teams must pull decades of corporate history from hundreds of custodians, spanning legacy email systems, cloud storage, chat apps, and specialized databases. Combine that internal corporate footprint with thousands of incoming plaintiff medical records and questionnaire responses, and teams face terabytes of information. 

Standard processing tools can choke on this volume. If a team’s tech stack can't handle heavy data ingestion, hosting fees will skyrocket, and reviewers will spend half their time waiting for pages to load.

Multi-party coordination

Managing a mass tort means keeping a sprawling defense team on the same page. A typical defense structure relies on national coordinating counsel driving overall strategy, local counsel handling regional hearings, in-house counsel watching the bottom line, and third-party vendors managing document review. 

If these groups operate in silos, things can fall apart quickly. Counsel in one venue might take a different stance on a discovery request than counsel in another, leading to conflicting positions, wasted effort, and unnecessary disputes with opposing counsel.

Cross-matter consistency

In a mass tort, plaintiffs share information. That means cross-matter consistency is essential for protecting the company. If a key engineering email is produced without redactions in an early state court proceeding, a team can't claim it's privileged or non-responsive in the federal MDL six months later. 

Inconsistent coding decisions destroy credibility with judges and open the door to costly evidentiary disputes that could take weeks to untangle.

Deduplication across related cases

With new plaintiffs joining the docket every week, teams constantly ingest data sets that duplicate existing files. If they deduplicate data only on a case-by-case basis, they can end up paying to host and review the same documents multiple times. 

Across multi-custodian corporate collections, email threading and global deduplication routinely eliminate 30% to 50% of the raw document volume prior to linear review. Implementing them early keeps hosting costs under control and stops reviewers from burning billable hours on duplicate records.

Timeline pressure

Judges managing mass tort dockets can set tight Bellwether trial dates and aggressive discovery schedules to keep the docket moving. Teams are often expected to collect, review, and produce millions of pages in a matter of weeks, all while handling ongoing motions, depositions, and supplemental requests. 

When timeline pressure hits, teams without scalable review workflows end up throwing expensive bodies at the problem just to meet deadlines.

Technology and workflow standardization

Technology is key. According to the U.S. Chamber Institute for Legal Reform, roughly 47% of total costs in the U.S. tort system go toward legal fees and administrative overhead. When multiple law firms and vendors collaborate without a central framework, that operational friction can skyrocket.

Different teams often bring their own preferred platforms, shortcuts, and review protocols to the table, leading to technology fragmentation. Data ends up scattered across disparate systems, obscuring cross-docket reporting and leaving leadership without line-of-sight into total spend or review accuracy.

Common mistakes in mass tort ediscovery

Successfully managing an expanding docket requires adapting everyday discovery practices to a multi-case environment. Here are the most common traps teams encounter when managing ediscovery for mass tort litigation.

Treating each plaintiff's case as a standalone review

Standard discovery workflows are designed for single actions, not expanding dockets. Defaulting to a case-by-case setup naturally silos data, forcing multiple firms to evaluate the same core corporate records for different plaintiffs. 

That redundancy inflates hosting and review spend while introducing a severe risk: Firm A tagging a key document as responsive while Firm B marks it non-responsive in a parallel action.

Delaying platform standardization until volume is unmanageable

It may seem wise to start early discovery with whatever legacy software is on hand while planning to upgrade if the litigation gets bigger. But mass torts grow fast. By the time a team realizes the current software can't handle the load, they’re already drowning in data. 

Migrating millions of documents, active coding tags, complex redactions, and work product mid-litigation is stressful, expensive, and incredibly risky.

Maintaining separate privilege logs per firm

Allowing different law firms to build their own independent privilege logs is a recipe for disaster. One firm might write detailed, airtight descriptions, while another uses vague phrasing that invites a motion to compel. If a judge overrules a privilege assertion in one court because of a poorly drafted log entry, that ruling can jeopardize attorney-client privilege protections across the entire litigation.

Scaling custodian identification reactively

Reactive custodian identification puts defense counsel behind the curve immediately. When teams let plaintiff demands dictate custodian scope, they spend the rest of the litigation scrambling through supplemental collections, issuing late legal holds, and risking missed disclosure deadlines or spoliation disputes.

Ediscovery best practices for managing mass tort litigation

To run a smooth defense across an expanding docket, teams need repeatable, scalable processes that lower costs and prevent errors. Here are the ediscovery best practices for mass tort litigation recommended by seasoned defense counsel.

Centralize data infrastructure

Consolidate all litigation data into a single, cloud-based repository from the start of a matter. This prevents files from getting scattered across regional servers or separate firms’ databases. 

It also centralizes setup so teams can effectively run global deduplication across all custodian files, apply master analytics to the document universe, and maintain a core repository of key corporate records that feed every related case.

Centralize workflow infrastructure

Require every law firm, review vendor, and internal team to work inside a single cloud ediscovery platform. 

Standardizing on one system gives leadership real-time visibility into review progress, speed, and accuracy. It also ensures everyone can use the same advanced review tools — including generative AI and predictive coding — without worrying about moving data between different systems.

Standardize privilege protocols

Set a docket-wide privilege protocol and privilege log at the start of the litigation. Establish clear rules for what qualifies as privileged, set standard reason codes, and use automated metadata extraction to build log entries. 

Having a dedicated, specialized privilege team review all flagged documents ensures the attorney-client and work-product protections remain rock-solid across every jurisdiction.

Standardize coding protocols

Draft clear, straightforward review guidelines and a simple, master tag palette for every firm working on the matter. Before anyone starts reviewing documents, host a joint kickoff session to walk through the protocol. 

Once review is underway, run automated quality-control checks regularly to catch any coding differences between teams before documents go out the door to opposing counsel.

Build a review team structure that scales with docket growth

Set up a review process that pairs experienced lead attorneys with smart technology. Instead of relying purely on large teams of linear reviewers, use advanced AI, conceptual search, and topic clustering to group similar documents together. 

This allows senior counsel to focus on finding key hot documents for trial preparation, while automated review workflows handle bulk responsiveness tagging quickly and accurately.

Systematize custodian identification

Map out the company's corporate structure early on. Look at org charts, product launch timelines, and IT systems to identify the key enterprise custodians — like product managers, regulatory leads, and senior engineers — whose files will be relevant to almost every claim. 

Collecting data from these core custodians up front can give teams a solid baseline repository that covers the majority of discovery requests down the road.

Systematize legal hold intake

Ditch manual emails and spreadsheets, and use dedicated software to automate your legal hold process. 

As new cases get filed, automated workflows can make it easier to issue holds to new custodians, send automated reminders, track acknowledgments, and adjust hold scopes as the litigation evolves. It creates a clean, clear record of compliance without taking up hundreds of administrative hours.

Centralize and scale your mass tort ediscovery process with DISCO

Handling a massive, fast-moving litigation docket requires technology that can scale without slowing down. DISCO offers the cloud-native speed, advanced artificial intelligence, and centralized review environment needed to bring order and efficiency to complex mass tort defense.

With DISCO, teams can easily ingest terabytes of data, run global deduplication across millions of files, and manage multi-firm review teams inside one intuitive workspace. Advanced AI tools speed up document categorization and privilege review, helping counsel hit tight Bellwether deadlines while keeping coding completely consistent across every production.

Ready to take control of your mass tort discovery strategy and rein in review costs? See how DISCO ediscovery software simplifies complex document reviews, or get a demo today.