Industrial Design, Human Factors & Usability Engineering
https://en.wikipedia.org/wiki/Human_factors_and_ergonomics
https://en.wikipedia.org/wiki/Usability
Human factors and ergonomics (HF&E) is the practice of designing products, systems, or processes to take proper account of the interaction between them and the people who use them. Usability is the ease of use and learnability of a human-made object.