Why ecodesign must be an engineering discipline

Sustainability targets are increasingly influencing product strategies, customer requirements and purchasing decisions. Yet ecodesign is sometimes reduced to selecting a recycled material or adding an environmental claim. This approach can create unintended trade-offs and credibility risks. A material with recycled content may require more energy in processing, shorten product life or make repair difficult.

Effective ecodesign treats environmental impact as a design parameter alongside function, quality, cost, weight, manufacturability and risk. The objective is to improve the complete product system rather than optimise one visible attribute.

Start with hotspots, not assumptions

The first step is to understand where the relevant impact occurs. Depending on the product, the dominant factors may be raw material production, manufacturing energy, transport, use-phase consumption, maintenance or end-of-life treatment. A simplified lifecycle screening can identify the main hotspots before a detailed assessment is commissioned.

This prevents teams from investing effort in areas with limited influence. For an energy-consuming product, efficiency during operation may dominate. For a passive component produced in high volumes, material choice and manufacturing yield may be more important. The analysis should use a consistent functional unit so that alternatives provide the same required performance.

Translate sustainability into design requirements

Environmental goals need to become measurable engineering requirements. Examples include maximum material mass, recycled content, repair time, number of material families, energy consumption, durability, disassembly steps or recovery rate. These targets are then integrated into the requirements specification and concept evaluation.

Value Engineering methods are particularly useful because they ask how a required function can be delivered with fewer resources. A function-oriented view avoids fixing the current solution too early. It may reveal that the best improvement is not a greener version of the same component, but a different architecture, service concept or lifecycle model.

Balance environment, cost and customer value

Ecodesign decisions should be assessed in a multi-criteria model. Environmental impact is important, but solutions must also satisfy safety, reliability, customer acceptance, supply availability and business viability. Cost analysis helps distinguish between measures that reduce both impact and cost, measures that require investment but create market value, and measures that shift burden elsewhere.

Typical win-win levers include reducing material mass, improving yield, extending product life, reducing energy demand, simplifying assembly and enabling remanufacturing. Other measures may need a strategic decision, for example when a lower-impact material is more expensive but supports regulatory compliance or a premium market position.

Create evidence and continuous improvement

Claims should be based on documented assumptions and comparable methods. The design team should record why an alternative was selected, which data was used and which trade-offs remain. As the product matures, screening values can be replaced by supplier-specific or process-specific data.

Ecodesign becomes most effective when it is embedded in the normal product development process. Gate reviews should include environmental performance, just as they include cost and technical risk. In this way, sustainability moves from a late communication topic to an early source of innovation and product value.

RENNET perspective

RENNET combines industrial expertise, Cost and Value Engineering methods, manufacturing knowledge and digital tools to support fact-based product decisions.

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