According to the synthesis perspective, what two goals did Norman argue were inseparable for commercial success in design?

Answer

Engineering function and crafting experience

Norman’s innovation was the recognition that the engineering goals of function (safety, efficiency) and the experiential goals of delight and mental model fit were inextricably linked for commercial viability.

According to the synthesis perspective, what two goals did Norman argue were inseparable for commercial success in design?
inventionprincipleuser experienceUX design