Design Defect

A design defect is a flaw inherent in a product's blueprint or engineering specifications that makes the entire product line unreasonably dangerous, regardless of how carefully it was manufactured. In mass tort litigation, design defect claims are central to cases involving pharmaceuticals, medical devices, and consumer products because a single defective design affects every unit produced, enabling large plaintiff cohorts to share common liability theories. Plaintiff firms evaluate design defect allegations early in case development to assess litigation viability, common questions of fact, and the potential for class or MDL consolidation.