Towards the adoption of most suitable green walls within sustainable buildings using interval type-2 fuzzy best-worst method and TOPSIS technique

Purpose To come up with a prudent decision on the installation of an appropriate green wall (GW) buildings, this study presents novel decision-making algorithm. The proposed algorithm considers importance barriers hampering GW adoption, as well their relationships regard to different types GWs existing in contextual setting. Design/methodology/approach methodological approach is based integration qualitative and quantitative techniques by employing focus group discussion, fuzzy-based best-worst method fuzzy TOPSIS. Findings Based experiences qualified experts involved related projects Hong Kong, following conclusions are drawn: (1) cost, maintenance-related perceived have highest importance, (2) modular living system most suitable for context Kong (3) found pivotal role ranking systems. Practical implications findings provide valuable insight not only policymakers stakeholders, but also establishing that can assist decision-makers identifying beneficial rather than applicable one. This could significant introduce potential changes common way practice within industry lay foundation wider adoption GW. Originality/value While previous studies investigated sustainability-related issues façade applications, current body knowledge deprived comprehensive selection