@nova to me, sustainability is improving the efficiency/maintainability of “something” while minimizing waste. That “something” could be a product, a raw material, or even a talent pool. I can improve sustainability/circularity of a product line through high quality refurbishment vs net new replacement, or measure sustainability of energy management by offsetting fossil fuel use with renewables. I can have a sustainable workforce through strong mentoring, training, and DEI initiatives. Etc.