A design defect is a flaw in the design of a product that makes it unreasonably dangerous. Although a manufacturing defect may be due to an error in the production of the product, a design defect is something that is inherent in the design of the product and not due to an error in its production.
A design defect may have been the result of a lack of safety knowledge on the part of the designer or may have been an intentional decision to make the product more aesthetically pleasing or to save money on production costs.
Design defects can be difficult to identify because they are not always immediately apparent. A design defect can be discovered only after there has been a number of accidents or injuries that are similar to one another