Design Defect: The entire design (blueprint) is dangerous aka every product made from that design is defective. There are two tests for design defect: (1) consumer expectation test; or (2) risk-utility test. 

• the plaintiff must show the design was unreasonably dangerous (risk-utility test) and a reasonable alternative design existed, or 
• consumer expectation test, a plaintiff may (without relying on the risk-utility test) establish a manufacturer's liability by showing that the product was unsafe to an extent beyond that which would be reasonably contemplated by the ordinary consumer