Abstract
The terms that constitute Ideality in TRIZ are extremely appropriate to characterize the conflicting prerogatives of value/functionality, and environmental sustainability and human wellbeing. In a system perspective, the latter are mostly ascribable to harmful functions and consumption of resources. The paper introduces a classification of sustainable design initiatives based on the variations of the factors that contribute to Ideality. The classification urges designers to think of possible win-win solutions in which functionalities are not jeopardized by the search for more environmental-friendly solutions. Combining ideality and sustainability is a trigger towards making sustainable solutions more accepted, and, consequently, more effective in preserving the environment. In particular, the individuation of classes of sustainable design endeavors lay bare that the potential reduction of harmful effects is not a sufficient precondition to create sustainable products. Overall, TRIZ, along with its underlying theory and constructs, has proven to provide an effective key of reading for approaching the eco-design field in terms of the extent to which new products and solutions are promising.