Abstract
In the era of sustainability as the development concept, prefabricated buildings have gradually become an important way to achieve sustainable development of the construction process due to the advantages of high construction speed, energy-saving, and environmental protection. In order to make the prefabricated building develop in a sustainable direction, it is necessary to understand the importance and performance of the critical sustainability aspects of the prefabricated building. However, the existing research has not fully explored this point, and classification research on all aspects of sustainability according to the management priorities of sustainable development is lacking. The present study determines the critical sustainability characterization items (criteria) of prefabricated buildings and uses the importance-performance analysis (IPA) method to explore the sustainability importance and performance level of prefabricated buildings in Guangzhou on the basis of the three dimensions of economic, social, and ecological sustainability. In particular, this study revises the traditional IPA method and uses the comprehensive weight obtained by the analytical network process- (ANP-) entropy weight method to obtain the importance of items. Results show that items “environmental protection” and “construction civilization” are of high importance and perform well. “Construction cost” and “product quality” are considered high-importance items with relatively poor performance; that is, these areas require urgent improvement actions. The “policy support” item at the intersection of IPA coordinates is also an aspect worthy of attention and discussion. This study provides a useful reference for decision-makers and relevant personnel on determining the priority of project management and achieving the optimal allocation of resources to promote the sustainable development of prefabricated buildings.
Highlights
In the era of sustainability as the development concept, prefabricated buildings have gradually become an important way to achieve sustainable development of the construction process due to the advantages of high construction speed, energy-saving, and environmental protection
Compared with the few demonstration cities, most cities in China, including Guangzhou, the development of prefabricated buildings has been gradually carried out, the overall development trend is still relatively slow. is study takes Guangzhou as the representative of most domestic cities and uses the importance-performance analysis (IPA) method to study the sustainable development of prefabricated buildings. e research first screens and determines the critical sustainability characterization items of prefabricated buildings through literature analysis and expert interviews. en, IPA is used to analyze the correlation between importance and performance of prefabricated buildings in Guangzhou. is study uses the combined weights of Analytical network process (ANP) method and entropy weight method to measure the importance of items
From the perspective of the triple bottom line (TBL), the framework of sustainable development assessment criterion system can be divided into three dimensions of environment, economy, and society [98]. erefore, this study starts from the three dimensions of the TBL to determine the critical sustainability items of prefabricated buildings. is study first uses the literature analysis method to conduct a retrospective analysis of relevant literature in recent years [24, 66, 99,100,101,102,103]
Summary
Prefabricated buildings, which are an important part of construction industrialization, are receiving an increasing attention [32, 33]. Ese sustainability rating systems expose many shortcomings during use process, such as the complexity and diversity of standards, the bureaucratic evaluation process, and the high use cost [53] These assessment tools rarely comprehensively consider multiple aspects of sustainability and generally pay insufficient attention to the economic and social aspects of sustainability [54]. Understanding and evaluating the importance and performance of prefabricated buildings in terms of sustainability are important to sustainably develop these buildings, but the existing studies have not adequately discussed this issue. Erefore, this study comprehensively considers the sustainability of the three dimensions of ecology, economy, and society and regards the interdependence among the evaluation criteria using the revised IPA tools to analyze the importance and performance of the evaluation items for overcoming the shortcomings of the abovementioned research Items with different levels of sustainability performance need to adopt differentiated implementation methods for balancing the sustainable development of prefabricated buildings. erefore, this study comprehensively considers the sustainability of the three dimensions of ecology, economy, and society and regards the interdependence among the evaluation criteria using the revised IPA tools to analyze the importance and performance of the evaluation items for overcoming the shortcomings of the abovementioned research
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