How do you design a circular product?
Disassembly, right materials, repairability, second life: the design principles that determine whether a product stays in circulation or ends up in a landfill.
Designing the end from the beginning
The circular designer asks a question that traditional design ignored: what will happen to this object when it stops being useful? Every choice flows from this question: if the answer is «it will be disassembled and its materials recovered», then no structural adhesives, screws instead of welds where possible, identifiable and separable materials. The end of the cycle is designed at the beginning — afterwards, it's too late.
Material selection
Practical rules of the trade: prefer mono-materials over inseparable composites (multi-layer laminate is the nightmare of recycling); choose materials with real recovery supply chains, not theoretical ones; use recycled content where performance allows, creating demand for recovered material; reduce the variety of materials in the same product. And always: know the origin — a «green» material without traceability is just marketing.
Repairability: the right and the design
A repairable product requires precise choices: wear-prone components that are accessible and replaceable, spare parts available over time, open documentation, common tools. European regulations are pushing in this direction, but the real difference comes from design culture: repairability is either a requirement from the first sketch or it never arrives. For the designer, it is also a professional satisfaction: repairable objects are almost always better-understood objects.
Durability: quality as an environmental strategy
Doubling the useful life of a product roughly halves its annual production impact. Durability is the most powerful and least celebrated circular strategy: materials that age well, aesthetics that don't fade in a season, upgradability (especially in electronics), and business models that reward it rather than fight it. The historical enemy — planned obsolescence — is the exact opposite of circular design: value destroyed by design.
Measuring design
Design is measurable too: percentage of recycled content at input, real recyclability at output, repairability index, expected useful life — and, in serious projects, verified useful life. In circular projects on Simbial, these indicators are built into the measurement plan from the design phase: because a "sustainable" product without numbers is an adjective, and we work with nouns.
Frequently asked questions
What makes a product repairable?
Accessible and replaceable wear components, available spare parts, documentation, common tools — and above all, the choice to design it that way from the very first sketch.
Why are composite materials a problem?
Because inseparable layers of different materials make recycling technically difficult or uneconomical. Circular design favours mono-materials or separable composites.
How is the circularity of a product measured?
With indicators such as recycled content, real recyclability, repairability index, and useful life. In Simbial projects, these are built into the measurement plan from the design phase.
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