“But, socio-technical systems are oriented toward people and services. While product excellence and competitive costs are also important to services, they are not enough. The service sector is oriented toward consumption, that is, toward people, who are the consumers of services. Therefore, an overriding design objective for good socio-technical, service oriented systems has to be a positive user experience. Ease of use, intuitive interfaces and good overall customer service must be key objectives for a well designed system.”
Design Principles for Complex, Unpredictable, People Oriented Systems
A well-thought through post on experience and systems. By IBM, who else.