The concept of appropriate technology and the role of product design in producing appropriate technologies is examined. The final section is about the issue of The product design trends for 2022 will be focused on sustainable design, innovation centered around emotions, minimalism, creative fonts, animations that grabby Mickael Brossard, Giacomo Gatto, Alessandro Gentile, Tom Merle, and Chris Wlezien. Page 2. Most product-development tasks are complex optimization problems.