Design for sustainability is an approach that integrates environmental, social, and economic considerations into design decisions throughout a product's entire life cycle. Its aim is to satisfy user needs while reducing negative impacts and supporting long-term sustainability.
In IB Design Technology subtopic C2.1, sustainability is not treated as an additional feature added after a product has been designed. It influences decisions from the initial design specification through material selection, manufacture, distribution, use, and end-of-life management.
The approach considers three interconnected dimensions:
| Dimension | Design considerations |
|---|---|
| Environmental | Reducing resource consumption, pollution, waste, energy use, and damage to ecosystems |
| Social | Protecting health, safety, equality, working conditions, and community well-being |
| Economic | Producing a financially viable solution that delivers lasting value and uses resources efficiently |
Designers apply life cycle thinking to assess impacts at each stage of a product's existence. For example, selecting recycled aluminium may reduce demand for virgin material, but the designer must also consider processing energy, transport distance, manufacturing methods, product durability, and whether the aluminium can be recovered after use.
Strategies may include minimizing material use, selecting renewable or recycled resources, improving energy efficiency, designing for durability, and enabling repair, upgrading, disassembly, reuse, remanufacture, or recycling. These strategies can support a circular economy, in which products and materials remain in use rather than becoming waste after a single linear cycle.
A common misconception is that sustainable design only means choosing an environmentally friendly material. Material choice is important, but a credible judgment must consider the complete life cycle and possible trade-offs among environmental, social, and economic impacts.
Exam technique: When asked to explain or evaluate design for sustainability, identify a specific design decision, connect it to a life cycle stage, and explain its consequence. For evaluation, include both benefits and limitations before reaching a justified conclusion.