34th Annual Conference of the International Group for Lean Construction (IGLC 34) - Singapore, Singapore - 2026

https://doi.org/10.24928/2026/0211

Resident-facing renovation decision support tool for collaborative decision-making

Kädi-Riin Vendel1, Ergo Pikas2, Müge Tetik3 & Tiit Tammaru4

1Early Stage Researcher, Department of Civil Engineering and Architecture, School of Engineering, Tallinn University of Technology, Tallinn, Estonia, [email protected], orcid.org/0009-0004-1702-1817
2Associate Professor, Department of Civil Engineering and Architecture, School of Engineering, Tallinn University of Technology, Tallinn, Estonia, [email protected], orcid.org/0000-0001-5691-685X
3Postdoctoral Researcher, Department of Civil Engineering, School of Energy Systems, Lappeenranta-Lahti University of Technology, Lahti, Finland, [email protected], orcid.org/0000-0002-4013-0577
4Professor, Department of Ecology and Earth Sciences, School of Geography, University of Tartu, Tartu, Estonia, [email protected], orcid.org/0000-0003-1590-1269

Abstract

Energy renovation in multi-family apartment buildings is a socially complex decision-making process where collective action often stalls due to financial uncertainty, perceived fairness issues, and the difficulty of comparing options across many households. These challenges are further amplified in district-level programmes that aim to accelerate renovation by bundling multiple buildings, increasing the coordination burden and making the need for decision support more critical for reaching consensus. This paper presents a Design Science Research of a resident-facing decision support tool developed and demonstrated in a renovation pilot involving four similar Soviet-era apartment buildings, where public co-funding was available conditional on housing association approval. The tool defines a bounded decision space and translates renovation scope into household monthly cost terms under explicit financing and energy performance inputs. Rather than relying on technical indicators alone, it presents monthly loan payments together with before-and-after household costs, expressed per square meter and typical apartment size. In facilitated resident discussions, the tool was used as a shared comparison frame, and each building group shortlisted two renovation scenarios for subsequent voting. The case illustrates how simple, transparent cost translation can make scope uplifts discussable and support structured comparison in complex collective renovation decisions.

Keywords

Sustainability, collaboration, stakeholder engagement, visual management, design science.

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Reference in APA 7th edition format:

Vendel, K., Pikas, E., Tetik, M. & Tammaru, T.. (2026). Resident-facing renovation decision support tool for collaborative decision-making. In Hamzeh, F., Poshdar, M., & Garcia-Lopez,, N. P. (Eds.), Proceedings of the 34th Annual Conference of the International Group for Lean Construction (IGLC 34) (pp. 507–518). https://doi.org/10.24928/2026/0211

Shortened reference for use in IGLC papers:

Vendel, K., Pikas, E., Tetik, M. & Tammaru, T.. (2026). Resident-facing renovation decision support tool for collaborative decision-making. IGLC34. https://doi.org/10.24928/2026/0211

 

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