The phrase "quality of design" refers to the level of excellence in the creation of a product or service. Synonyms for this phrase can include "superior craftsmanship," "impeccable construction," "exceptional artistry," "precision engineering," and "meticulous attention to detail." Other terms that encompass the idea of quality design might include "high-end aesthetics," "ingenious innovation," "intuitive usability," and "innovative functionality." Essentially, any phrase that emphasizes excellence in design can be considered a synonym for "quality of design." This term is especially important in the world of marketing and product development, as it plays a key role in attracting and retaining customers.