1. Ashby, M. F., and Johnson, K., Materials and Design — the Art and Science of Materials Selection in Product Design, Butterworth Heinemann, Oxford, UK (2002)
2. A disingenuous statement. It costs design time.
3. Many designers working on a product assemble a ‘mood board’ with images of the sort of people for whom the product is intended, the surroundings in which they suppose it will be used, and the other products that the intended user group might own, seeking to capture the flavor of their lifestyle.
4. Aesthetics, associations, and perceptions are discussed more fully in the book by Ashby and Johnson (see above).
5. The dates are, of course, approximate. Design styles do not switch on and off on specific dates, they emerge as a development of, or reaction to, earlier styles with which they often coexist, and they merge into the styles that follow.