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Open design (OD) is a promising approach to address global sustainability challenges. At the same time, however, the increased use of OD brings new challenges. To understand the potential of OD in a specific context, we adopted the concept of a residential rainwater harvesting system (RWHS) as a case study. We first identified the critical design features of the RWHS. After that, we analysed the potential for local reproduction of these features at the grassroots level of low-income communities in developing countries. This analysis revealed that varying limitations related to materials, skills, and manufacturing tools may hamper the adoption of OD by local communities when trying to improve their water management. In the light of our findings, we argue that OD processes are likely to face challenges if replicability, substitutability and adaptability are not successfully integrated into the design. We suggest  a design-for-frugality mindset  and  adoption of parametric design processes and design parameters  as key strategies to boost OD processes in low-income communities. We also stress the importance of safety and liability aspects in the studied context.

Challenges of open design in low-income communities: a case study of residential rainwater harvesting systems