: Producing with less Materials, Cycling, Durability, Localisation Functional Effficiency : Multifunctionality Passive Engineering, CHP, Space Use Use Efficiency : More use of produced stuff Access-based living, Public services Welfare Efficiency : Better welfare from each act Skills training, End-use Service Sustainable Design ⊖U/⊗R ⊖P/⊗R ⊖FS/⊗P ⊖UC/⊗FS ⊖U/⊗UC Functional Perspective Built Design Experiences / Interfaces not objects Lifestyles Experiences / Outcomes not ownership }