Quite often each discipline believes its distinct contribution to…

Quite often each discipline believes its distinct contribution to be most important: "Price," argues the marketing representative, "price plus these features." "Reliable," insist the engineers. "We have to be able to manufacture it in our existing plants," say the manufacturing representatives. "We keep getting service calls," say the support people; "we need to solve those problems in the design." "You can't put all that together and still have a reasonable product," says the design team. Who is right? Everyone is right. The successful product has to satisfy all these requirements.

— from Takeoff Into Chaos · Design of Everyday Things by Don Norman

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