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Users don’t care whose fault it is that a product works poorly, only that it works poorly. All the disciplines need work together to figure out solutions to product flaws, with visual, interaction, and industrial design blending their strengths together. The visual design should make the interaction design look good, which in turn makes the industrial design look good, which makes the visual design look good. (Mix up the order as you will.) Focusing on the connective tissue between disciplines makes products holistic.
This is the essence of experience design.
