IA3 sustainable design project in QCE Design Unit 4
“IA3 project - the format, weighting and requirements of the third internal assessment, how it applies a redesigning and circular approach in Unit 4, what a strong folio evidences from life-cycle critique to justified redesign, and how the sustainability improvement is demonstrated”
IA3 is the sustainable design project, the third internal assessment, worth 25 percent. It asks you to apply a redesigning and circular approach in the context of sustainable design - improving the economic, social and ecological sustainability of an existing design. A strong folio opens with a sharp life-cycle critique of an existing design, frames a focused redesign opportunity, applies circular strategies (design for disassembly, mono-materials, durability, repairability), and evaluates the redesign against sustainability criteria with evidence of a measurable improvement over the original. The justification names which sustainability dimension and circular principle each change serves. Confirm the exact requirements and format against your school's current QCAA instrument.
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What this dot point is asking
QCAA's IA3 is the project aligned to Unit 4 sustainable design - the third internal assessment, worth 25 percent. This page explains what the project requires, how it applies a redesigning and circular approach, and what a strong folio looks like. The project is where sustainable design is shown at full length, so the marks reward a sharp life-cycle critique, a focused redesign opportunity, circular strategies applied, and evidence of a measurable improvement over the original.
The answer
What IA3 is
IA3 is the design project for Unit 4, where sustainable design is practised in full. Unit 4 is about designing for sustainability - products, systems and environments that can be supported indefinitely across economic, social and ecological dimensions. The project applies this through a redesigning approach: rather than starting from a blank brief, you take an existing design and improve its sustainability. It is worth 25 percent of the subject result.
The redesigning and circular approach
The project begins with an existing design and a critical eye. The redesigning approach means diagnosing what is wrong with the current design's sustainability and improving it, which is often higher-leverage than designing from scratch. The circular approach supplies the strategies - designing out waste, keeping materials in use through durability, repair and recovery, and regenerating systems. Together they turn the broad principle of sustainability into concrete redesign moves.
What a strong folio evidences
The folio is the assessed artefact and must evidence the whole arc:
- A life-cycle critique - an analysis of the existing design across its life stages (extraction, manufacture, distribution, use, end of life) that identifies the biggest sustainability impacts.
- A focused redesign opportunity - one well-chosen problem, not a scatter of vague intentions, framed from the critique.
- Sustainability criteria - specific, measurable conditions the redesign must meet, drawn from the critique.
- Circular strategies applied - design for disassembly, mono-materials, modularity, durability and repairability, used deliberately.
- A resolved redesign - visualised and prototyped, with the changes clearly linked to the impacts they address.
- An evidenced evaluation - the redesign judged against the sustainability criteria, with a measurable improvement over the original.
Demonstrating the improvement
The defining feature of a strong IA3 is evidence of a measurable improvement. It is not enough to claim a redesign is greener - you must show it, by comparing the redesign against the original on the criteria. That might be fewer materials, materials that can be recovered, a longer life through repairability, or a reduced impact at the life-cycle hot spot you identified. The comparison is what makes the sustainability gain defensible rather than asserted.
Justifying against dimensions and principles
The justification should name, for each change, which sustainability dimension it serves (economic, social or ecological) and which circular principle it applies (design out waste, keep materials in use, regenerate systems). Naming this makes the reasoning explicit and shows you understand why a change helps, not just that it does. This precision is where the top-band marks sit.
Worked example
Existing design: a glued, multi-material electric kettle that cannot be repaired or recycled.
Life-cycle critique: manufacture of mixed plastics and a sealed heating element dominates impact; end of life is landfill because nothing separates; the use phase is efficient already.
Redesign opportunity: enable repair and material recovery without harming use-phase efficiency.
Circular redesign: clip-together housing (design for disassembly), a single recyclable polymer shell (mono-material), and a replaceable heating module (keep materials in use, slowing the loop).
Evidenced improvement: against the original, the redesign separates into recyclable streams and survives one element failure instead of being binned - a measurable gain on the disassembly and durability criteria. The justification names each change's dimension (ecological) and principle (keep materials in use), which is exactly what markers reward.
IA3 is the sustainable design project, worth 25 percent. It applies a redesigning and circular approach - improving an existing design's economic, social and ecological sustainability. A strong folio runs from a life-cycle critique to a focused opportunity, applies circular strategies, and evaluates the redesign against sustainability criteria with evidence of a measurable improvement over the original. Confirm requirements against the current QCAA instrument.
- A vague critique
- "It's not very sustainable" is not analysis. Diagnose impacts stage by stage across the life cycle to find the real hot spot.
- A scattered opportunity
- Trying to fix everything produces a shallow redesign. Choose one focused, evidenced opportunity.
- Claiming improvement without evidence
- A "greener" claim must be shown by comparing redesign against original on the criteria. Assertion is not justification.
- Equating sustainable with recycling
- Slowing loops through durability and repair usually beats recycling. Apply the full circular hierarchy.
- Not naming dimension and principle
- Top-band justification states which sustainability dimension and circular principle each change serves, not just that it helps.
Exam-style questions
Questions in the style of QCAA exam questions on this dot point, each with a worked answer. They are written by ExamExplained unless tagged "Past paper"; the year shows the paper a question is modelled on.
Practice9 marksFor the IA3 sustainable design project, justify how a strong folio carries a life-cycle critique of an existing design through to a justified redesign that demonstrates a measurable sustainability improvement. Use an example to support your response.Show worked answer →
IA3 is judged on a redesigning, circular approach, so the marker is looking for an evidenced chain from critique to a measurably better redesign.
Justify the chain: a life-cycle critique identifies where the existing design carries its biggest environmental cost (materials, manufacture, use, end of life); the redesign targets that hotspot using circular principles (reduce, reuse, repair, recycle, design out waste); and the improvement is shown with evidence, for example replacing a glued multi-material part with a single recyclable material that can be disassembled, reducing landfill at end of life.
Markers reward a folio where the redesign decisions trace back to the critique and where the sustainability gain is demonstrated rather than asserted.
Practice6 marksEvaluate an IA3 redesign that improves appearance and cost but cannot show a measurable sustainability improvement. Justify how the marking would be affected.Show worked answer →
A 6 mark evaluate answer needs a judgement tied to the IA3 criteria.
Evaluate: IA3 rewards a sustainability improvement grounded in life-cycle thinking, so a redesign that improves cost and looks but not measurable sustainability misses the central requirement; the critique-to-redesign chain breaks and the justification cannot evidence the intended outcome. The work may be competent but off-target.
Justify: markers assess whether the redesign delivers and demonstrates a sustainability gain, so failing to evidence one caps the band regardless of other merits. Markers reward recognising that the measurable improvement is the assessed outcome, not an optional extra.