If you think of the product as a service, then the separate parts make no sense - the point of a product is to offer great experiences to its owner, which means that it offers a service. And that experience, that service, comprises the totality of its parts: The whole is indeed made up of all of the parts. The real value of a product consists of far more than the product's components.
Donald A. NormanI think a successful company is one where everybody owns the same mission. Out of necessity, we divide ourselves up into discipline groups. But the goal when you are actually doing the work is to somehow forget what discipline group you are in and come together. So in that sense, nobody should own user experience; everybody should own it.
Donald A. NormanComplexity is acceptable as long as it is intelligible and necessary. We want to avoid needless complications.
Donald A. NormanDesign is really an act of communication, which means having a deep understanding of the person with whom the designer is communicating.
Donald A. Norman