Design for Sustainable Behaviour: Using Products to Change Consumer Behaviour – A Comprehensive Summary

Introduction to Sustainable Design and Behaviour

Sustainable design encompasses environmental, economic, and social impacts throughout a product’s lifecycle. While environmental and economic aspects are well-explored, the social dimension requires further attention. This includes factors such as personal responsibility, quality of life, well-being, and cooperative behaviour.

Designers influence product development, directly affecting society and environment. However, many impacts, especially during product use (e.g., energy consumption of electronic devices), depend heavily on consumer behaviour. Despite information campaigns by governments and NGOs, achieving long-lasting behavioural shifts remains challenging because consumers struggle to connect information to their personal actions and the broader environmental consequences.

What is Design for Sustainable Behaviour (DfSB)?

DfSB is an emerging sustainable design approach that focuses on reducing a product’s environmental and social impact by moderating how users interact with it. Unlike traditional sustainable design, which concentrates on production, DfSB aims to influence the consumption phase—especially product use patterns, maintenance, and disposal.

Key Behavioural Insights

• Consumption is Multifaceted: It involves product selection, use, maintenance, repair, disposal, and recycling, beyond mere purchasing.
• Habitual Nature of Consumption: Many behaviours become automated habits requiring minimal conscious thought, making behavioural change difficult.
• Behaviour Models: The study references social-psychological theories such as:
  • Theory of Planned Behaviour (Ajzen, 2006): Behaviour influenced by attitudes, subjective norms, and perceived behavioural control.
  • Integrated Model of Interpersonal Behaviour (Triandis, 1977): Emphasizes social factors, emotions, and habits mediating behaviour change.
• The Intention–Behaviour Gap: Values often do not translate into actions, necessitating better design intervention to bridge this gap.

Case Studies Exploring DfSB Application

Two product categories were studied:

1. Household Refrigerators

• Focused on environmental impacts during use.
• Understanding user behaviour linked to energy consumption patterns.
• Highlighted opportunities where designers can intervene to foster energy-efficient behaviours.

2. Mobile Phones

• Analyzed social impacts.
• Examined designers’ perceptions of ethical and effective strategies to promote sustainable use.
• Raised important ethical considerations when selecting intervention methods.

Design Intervention Strategies

The paper outlines various strategies aimed at encouraging sustainable behaviour through product design, including:

• Providing immediate feedback to users about the impact of their actions.
• Designing products that require less energy or fewer resources during use.
• Facilitating easy maintenance and repair to prolong product life.
• Encouraging social norms that support sustainability.

Ethical Considerations

The choice of strategies to influence consumer behaviour must consider:

• Appropriateness and acceptability to users.
• Avoidance of manipulative or coercive tactics.
• Respect for user autonomy.

Conclusions and Implications for Designers

• Designers hold significant potential to influence sustainable use behaviours.
• There is a need to shift focus from merely improving production processes to actively shaping consumption patterns.
• Understanding user habits and psychological motivators is essential for effective intervention.
• The social impact of products deserves increased attention alongside environmental and economic factors.
• Future design practices should integrate behavioural theories and ethical considerations to promote long-term sustainable consumption.

Key Takeaways for Sustainable Product Design Professionals:

• Behavioural change is crucial for reducing environmental/social product impacts.
• Sustainable design must address the ‘use’ phase, not just production.
• Products can act as tools to educate and encourage sustainable behaviour.
• Designers should collaborate with behavioural scientists to devise effective interventions.
• Ethical design respects user choice while fostering sustainability.

Reference: Bhamra, T., Lilley, D., & Tang, T. (2011). Design for Sustainable Behaviour: Using Products to Change Consumer Behaviour. The Design Journal, 14(4), 427-445. DOI:10.2752/175630611X13091688930453

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