AbstractIn cases where the use of a prefabricated housing system is necessary, the lack of a proper decision-making model for selecting an affordable prefabricated housing system can lead to the selection of an unsuitable system, deviation from project goals, loss of employer capital, and depriving residents comfort. Accordingly, this study aims to propose a decision-making model for the selection of an affordable prefabricated housing system for Iran. The research method of the present article is descriptive-analytic, in which Delphi and the analytic hierarchy process (AHP) are used for data analysis, and the research subjects who filled up questionnaires included 150 experts. Using the Delphi method, 25 important criteria and 5 decision dimensions were identified. Then, using the AHP method, it was found that the decision-making dimension of sustainability (with 7 specific criteria) was the most important and the ecoMOD was the most affordable prefabricated system. According to the results, decision makers in the construction industry in Iran are suggested to consider seven criteria of the sustainability dimension for selecting a system before any other criteria.

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