Function: The main purpose of a product, including primary and secondary functions. Functional analysis involves describing these functions, listing features, explaining operation, and potential misuse.
Performance: The ability of a product to fulfill its primary function, ensuring it is fit for purpose through prototypes, user trials, and test rigs. It also includes value for money, maintenance, and planned obsolescence.
Safety: Ensuring products are safe during design, manufacture, use, and disposal, adhering to safety standards and using non-harmful materials.
Ergonomics: Designing products that are easy, safe, and comfortable to use by considering human size, physical capabilities, and mental processes.
Aesthetics: Creating products that are visually appealing and engage other senses like touch, smell, and sound.