This study, that is a research and product development process, is based on sustainable development and the negative impacts of the growing consumption, and wear-and-tear habits of today’s society. The way we handle our resources, from mine to landfill cause devastating effects on the climate. LAST, is a multi-functional table made from wooden waste materials, that represents product design that allows the user to build a strong, long-lasting relationship with the product. The table is versatile, allows easy dismantling and incorporates qualities that create an incentive for the user to build an attachment to it to increase its lifetime. This has been done through applying different strategies within emotional design, product attachment and design for sustainability as well as applying knowledge within timeless design, aesthetic nourishment. The Japanese philosophy of Wabi Sabi has acted as inspiration to help navigate the projects design proposal that could allow for the user to appreciate their product for longer and indorse product longevity. The research question for the study is as follows: How can you promote product longevity by means of product design for sustainable development?

Syftet med studien har varit att ta reda på vad det är som gör att vissa möbler och inredning finns kvar hos oss en längre tid. Hur designers kan skapa hållbara produkter som konsumenten vill behålla en längre tid. På så sätt förlängs produktens livslängd och bidrar till en hållbarare konsumtion. Teorier som användes i studienvar produktanknytning, produktlivslängd, produktutbyte, tidlös design, estetik, form och material med ett övergripande fokus på hållbar design. Genom teorierna, möbelanalyser, intervjuer, skiss och prototypande har exempel för att designa för en lång livslängd tagits fram. Resultatet av studien blev en färgglad bordslampa med de typiska karaktäristiska dragen av en lampa och samtidigt en unik och skulptural design. / The purpose of the study has been to find out what it is that makes certain furniture and furnishings remain with us for a long time. How designers can create sustainable products that the consumer wants to keep for a longer period of time. In this way, the product lifetime is extended and contributes to more sustainable consumption. Theories used in the study have been product attachment, product longevity, product replacement, timeless design, aesthetics, form and materials with an overall focus on sustainable design. Through the theories and furniture analyzes, interviews, sketches and prototyping, examples for designing for an extended product life have been found. The result of the study was a colorfull table lamp with the typical characteristic features of a lamp and at the same time with a unique and sculptural design.