Designing out waste
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Flip to reveal answersName the four strategies for designing waste out.
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Question
Name the four strategies for designing waste out.
Answer
Longevity, upgradability, disassembly and dematerialization — with longevity first, because doubling the time in use halves everything else.
Question
How is disassembly made a specification criterion?
Answer
"Separated into material streams in under five minutes with standard tools", tested with a prototype, a screwdriver and a timer, by somebody who has not seen it before.
Question
What defeats longevity?
Answer
One unobtainable part. A product engineered for ten years with a five-year spares policy is a five-year product.
Question
Why is most waste upstream of the user?
Answer
Extraction and processing waste ore, water and energy far exceeding the mass of the finished part, and manufacture adds offcuts, sprues and rejects.
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Full study notes for Designing out waste
Topic 10.2 hub
Design for a circular economy
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