What designers need to keep in mind
“Designing well is not easy. The manufacturer wants something that can be produced economically. The store wants something that will be attractive to its customers. The purchaser has several demands. In the store, the purchaser focuses on price and appearance, and perhaps on prestige value. At home, the same person will pay more attention to functionality and usability. The repair service cares about maintainability: How easy is the device to take apart, diagnose, and service:? The needs of those concerned are different and often conflict. Nonetheless, the designer may be able to
satisfy everyone.”
From the book The Design of Everyday Things by Don Norman.