How do you measure and reduce the environmental impact of a product across its whole life, from raw material to disposal?
Sustainable design and the six Rs, life cycle assessment from raw material extraction to disposal, the impact of manufacturing on the environment, and strategies such as design for disassembly, the circular economy and ethical sourcing.
A focused answer to AQA A-Level Design and Technology Product Design core content, covering sustainable design, the six Rs, life cycle assessment, the environmental impact of manufacturing, and strategies such as design for disassembly and the circular economy.
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What this dot point is asking
AQA wants you to explain sustainable design and the six Rs, carry out and interpret a life cycle assessment from raw material to disposal, describe the environmental impact of manufacturing, and explain strategies such as design for disassembly, the circular economy and ethical sourcing.
Sustainable design and the six Rs
Life cycle assessment
An LCA might reveal, for example, that most of a kettle's impact comes from the energy used during its life rather than its manufacture. This is the single most useful thing an LCA does: it shows where in the life the impact concentrates, so the designer spends effort on the stage that matters. For products that are passive in use (a chair, a bookshelf) the manufacturing and material stages dominate, so lightweighting and material choice matter most. For products that consume energy in use (a kettle, a fridge, a car) the use phase dominates, so efficiency in use beats almost any change to materials or packaging. AQA also expects you to recognise the limits of an LCA: the result depends entirely on the quality of the data fed in, the boundaries chosen (does it include the user's electricity supply, or the disposal of the packaging?) are subjective, and a full LCA is time-consuming and costly, so designers often use a simplified version.
Strategies for sustainability
Designers reduce impact through design for disassembly (so parts can be separated, repaired and recycled), choosing recycled or renewable materials, ethical sourcing (fair labour and responsibly harvested materials such as FSC timber), energy-efficient manufacture, and moving toward a circular economy in which materials are continually reused rather than discarded.
Two related strategies deserve detail. Design for disassembly means joining parts so they can be separated again without destruction: using screws and clips rather than glue and welds, marking polymers with their type so they can be sorted, and minimising the number of different materials. This makes repair, upgrade and recycling practical instead of theoretical, because a product that cannot be taken apart usually goes to landfill whole. The circular economy contrasts with the traditional linear economy ("take, make, use, dispose"). In a circular model, products and materials are kept in use through reuse, repair, remanufacture and recycling, so that the output of one life becomes the input of the next, designing out waste from the start. Ethical sourcing extends sustainability beyond the environment to people: fair wages and safe conditions in the supply chain, and certification schemes such as FSC for timber and recognised standards for cotton and minerals, so the social cost of a material is considered alongside its carbon footprint.
Exam-style practice questions
Practice questions written in the style of AQA exam questions on this dot point, with worked answer explainers. The year tag is the paper they imitate, not the source.
AQA 20206 marksEvaluate the use of a life cycle assessment as a tool for reducing the environmental impact of an electric kettle. Refer to the main life cycle stages in your answer. [6 marks]Show worked answer →
A Paper 1 evaluate item assessing AO3. Markers want the stages applied to the kettle plus a judgement on the tool's usefulness and limits. Award marks for naming the stages and the kettle's impact at each: raw material extraction (steel, polymer, copper element); manufacture and assembly; packaging and distribution; the use phase (repeated boiling, which for a kettle dominates total energy and carbon); and end of life (recycling or landfill). The evaluation marks come from arguing both sides: an LCA usefully reveals that the use phase dominates, so the biggest impact reduction is a faster, well-insulated element and a minimum-fill line, not lighter packaging; but an LCA is only as good as its data, can be time-consuming and expensive, and involves subjective boundary choices about what to include. A top answer concludes that an LCA directs effort to the stage that matters most, which for a kettle is energy in use.
AQA 20224 marksExplain how applying the six Rs to the redesign of a disposable coffee cup could reduce its environmental impact. [4 marks]Show worked answer →
A short applied item. The trap is to jump straight to "recycle". Award marks for using the higher Rs first: rethink the product (could a reusable cup scheme replace the disposable model entirely?); refuse unnecessary material (drop the plastic lid or sleeve where possible); reduce material use and switch to a mono-material so it can actually be processed; reuse via a deposit-return reusable cup; repair is not relevant to a cup, which a strong answer notes rather than forcing; recycle the mono-material cup at end of life. Full marks need the hierarchy logic (prevention ranks above recycling) plus a specific design change for at least two Rs, not just a list of the six words.
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