No product liability case survives on lay testimony alone. Expert strategy product defect cases require a coordinated team of specialists, retained early and sequenced correctly, to establish the defect, the causal chain, and the damages. This page outlines the expert framework applied in the firm's home fire product case and the sequencing considerations that matter most.
5
Expert disciplines a serious product defect case often needs
1st
The origin or failure analyst is retained first, as the foundation
A common mistake in product liability litigation is retaining experts in the wrong order, or retaining a single generalist to cover ground that requires several distinct disciplines. Effective expert strategy product defect cases begin with the fire or origin investigator, or the mechanical failure analyst, whose findings establish the factual foundation everything else depends on. Only after that foundation is established does it make sense to retain a design engineering expert to opine on the alternative design analysis, followed by a human factors expert if warnings or instructions are at issue, and finally an economist or life care planner if the damages picture requires that specialized testimony.
The fire and origin or failure analysis expert establishes what happened physically: where a fire started, how a mechanical failure propagated, or how a component fractured or malfunctioned. Their methodology must follow recognized standards, and their report must clearly document the physical evidence examined, the testing performed, and the reasoning connecting the physical evidence to their conclusions. This report becomes the foundation that every subsequent expert builds upon, so its credibility and methodological rigor are paramount.
Once the failure mechanism is established, a design engineering expert addresses whether the design was defective and whether a safer, feasible alternative existed. Qualifications should closely match the specific product category and failure mode, since opposing counsel will exploit any mismatch between a generalist's credentials and the technical issues in the case.
When a failure to warn theory is part of the case, a human factors expert addresses how an ordinary consumer would have understood and responded to the warnings provided, and what a more effective warning would have looked like. This is particularly important when the defense argues the injury resulted from consumer misuse rather than a defect.
An engineer with regulatory or standards-setting background can address whether the manufacturer's design and testing practices complied with applicable industry standards and government safety regulations, helping the jury see how the company's conduct compared to the rest of the industry at the same time.
In a wrongful death product case, an economist or forensic accountant testifies to the decedent's lost earning capacity and financial support to survivors, while additional experts may address the noneconomic loss to surviving family members. Corporate defendants often retain highly credentialed defense experts, so effective cross examination targets the specific methodology gaps in their particular analysis, and a well-prepared plaintiff's expert who can explain complex concepts to a lay jury is often more persuasive than one with superior credentials who cannot communicate.
The case behind this page
How the firm assembled fire and engineering experts against a manufacturer for a grieving family.
Read the full caseRelated fire cases
Where the fire origin expert does the foundational work.
The litigation guideRelated breakdowns from this case and our product liability practice.
We take product liability and wrongful death cases as counsel or co-counsel and pay statutory referral fees. Call 323-658-8077 to discuss a referral.
Refer a caseSequencing matters because later experts build on the findings of earlier ones. The failure or origin analysis establishes the factual foundation, and design engineering, human factors, and damages experts each depend on that foundation being established first.
A design and engineering expert addresses whether the product's design was defective and whether a safer, feasible alternative design existed at the time of manufacture, using methodology and qualifications specific to the exact product category at issue.
A human factors expert is needed when a failure to warn theory is part of the case, particularly when the defense argues the injury resulted from consumer misuse rather than a product defect.
