The term quality has many meanings. Quality can mean that a product has many features not found in other products; it can mean that it is well-designed; or it can mean that it is defect-free. In this appendix, the focus is on the presence or absence of defects. The quality of conformance is defined to be the degree to which the actual product or service meets its design specifications. Anything that does not meet design specifications is a defect and is indicative of low quality of conformance.