Circular Design Strategies Significantly Underestimated in Environmental Impact Assessments

Why It Matters

Designers and engineers need to understand that simply remanufacturing a product is not the extent of circularity. Incorporating design for disassembly, modularity, and upgradability from the outset, alongside service-based business models, is crucial for maximizing resource efficiency and achieving genuine environmental gains.

Key Finding

Most studies on circular products only look at remanufacturing and don't account for how products are designed for circularity or how new business models like product-service systems contribute to environmental benefits.

Key Findings

• The majority of environmental assessments focus on remanufacturing existing products and compare it to manufacturing new ones.
• Product design strategies for circularity (e.g., design for remanufacturing, upgradability, modularity) and circular business models (e.g., product-service systems) are rarely considered in Life Cycle Assessment (LCA) studies.
• There is a lack of studies on products with circular designs utilized within circular business models.
• Many assessments are static and do not adequately consider future increases in renewable energy.

Research Evidence

Aim: To what extent do current environmental impact assessments accurately quantify the benefits of circular products and business models, particularly those incorporating design for circularity and advanced business models?

Method: Systematic Literature Review

Procedure: A systematic review was conducted on published environmental assessments related to circular products and business models, with a specific focus on reuse, refurbishment, and remanufacturing. The review mapped factors influencing environmental impact and identified gaps in current assessment methodologies.

Sample Size: 239 papers

Context: Environmental Impact Assessment of Circular Economy Initiatives

Design Principle

Design for Circularity: Prioritize product design that facilitates reuse, repair, refurbishment, remanufacturing, and eventual recycling, and pair this with innovative business models that incentivize resource retention.

How to Apply

When developing new products or redesigning existing ones, actively consider how the product can be designed for easier disassembly, repair, and component upgrades. Simultaneously, explore business models that shift from ownership to access (e.g., leasing, subscription services) to encourage product longevity and material retention.

Limitations

The review focused on 'inner loops' (reuse, refurbishment, remanufacturing) and may not fully capture the impact of 'outer loops' like recycling. Assessments often lack dynamic considerations for future energy mixes.

Student Guide (IB Design Technology)

Simple Explanation: When you try to figure out if a product is good for the environment by being 'circular', most studies only look at fixing up old products. They don't really check if the product was designed to be fixed easily or if the way it's sold (like renting instead of buying) helps the environment more.

Why This Matters: Understanding this helps you create designs that are truly sustainable, not just superficially 'green', and can lead to more innovative product-service offerings.

Critical Thinking: Given the limitations of current LCAs, how can designers proactively advocate for and implement circular design strategies that are likely to yield significant environmental benefits, even if they are not fully quantifiable by existing assessment tools?

IA-Ready Paragraph: This research highlights a critical gap in current environmental impact assessments for circular products and business models. While many studies focus on remanufacturing, they often overlook the profound influence of design strategies for circularity (e.g., modularity, upgradability) and innovative business models like product-service systems. Therefore, a comprehensive evaluation of a product's environmental performance within a circular economy necessitates a holistic approach that integrates both design for circularity principles and the associated business model.

Project Tips

• When evaluating the environmental impact of your design, go beyond just material selection and consider the entire product lifecycle, including design for disassembly and end-of-life scenarios.
• Explore how different business models can enhance the sustainability of your product design.

How to Use in IA

• Reference this study when discussing the limitations of traditional environmental assessments and justifying the need for a holistic approach to circular design in your project.

Examiner Tips

• Demonstrate an understanding that circularity involves both product design and business model innovation, not just material recycling or basic remanufacturing.

Independent Variable: Product design strategies for circularity (e.g., modularity, upgradability), Circular business models (e.g., PSS)

Dependent Variable: Environmental impact reductions

Controlled Variables: Focus on 'inner loops' (reuse, refurbishment, remanufacturing), Traditional manufacturing vs. remanufacturing comparison

Strengths

• Comprehensive systematic review of a significant body of literature.
• Identifies specific gaps in current assessment methodologies.

Critical Questions

• What are the most effective design strategies for enabling reuse, refurbishment, and remanufacturing?
• How can product-service systems be designed to maximize resource efficiency and minimize environmental impact?

Extended Essay Application

• Investigate the environmental impact of a product designed with modularity and upgradability, comparing it to a non-modular equivalent, and propose a product-service system to support its lifecycle.

Source

Circular products and business models and environmental impact reductions: Current knowledge and knowledge gaps · Journal of Cleaner Production · 2020 · 10.1016/j.jclepro.2020.125627