# Digitalizing Industrialized Construction Projects: Status Quo and Future Development
## 2 Methodology  
This study adopts a systematic literature review approach to offer an in-depth examination of the utilization of digital technologies in industrialized construction, as delineated in Figure 1. Initially, the study narrows its focus by outlining the contemporary landscape of digitalization within the field of industrialized construction. This entails a meticulous literature search conducted on the Scopus database, employing a set of predetermined keywords and criteria. Scopus offers extensive journal coverage, a superior quality of citation links, and a more flexible set of filters for literature selection [15]. Specifically, the keywords \"digital\" AND \"off-site construction\" OR \"prefabrication\" OR \"precast\" OR \"industrialized construction\" OR \"prefabricated construction\" are used to retrieve publications spanning from 2014 to 2023. The search string is applied to article title, abstract, and keywords. Additionally, the search is limited to English-language journal and conference articles. Identifying articles from journals and conference proceedings is considered sound practice in systematic reviews, as it ensures a more comprehensive literature sample, mitigates potential publication bias, and captures recent advancements [16].  
Following the literature search, a corpus of 298 articles is retrieved. To ensure the integrity of the subsequent analysis, a manual screening process is undertaken to remove irrelevant articles. This screening process targets articles that merely discuss new construction materials (e.g., glass fiber-reinforced polymer reinforcing bars and helically reinforced precast concrete piles), engage in material performance testing (e.g., testing the mechanical properties of materials such as concrete and reinforcing bars), or focus solely on conventional cast-in-place construction methods without direct pertinence to digital technologies in industrialized construction. Furthermore, empirical studies that only refer to the evaluation or application barriers of digital technologies without providing sufficient technical details are excluded during the screening process. Post-screening, a refined pool of 173 literature pieces emerges for systematic analysis. These selected articles are further categorized based on the distinct phases of industrialized construction, including design, production, construction, and operation and maintenance. Within each category, articles are further subdivided according to the specific applications of digital technologies.  
By delineating the research problem, adhering to a systematic literature search protocol, and implementing rigorous screening and categorization methodologies, this study ensures the assembly of a representative literature sample. This process, conducted from January to March 2024, is essential for providing a comprehensive appraisal of the latest developments in the field. However, the manual screening process, while necessary to ensure the relevance of the included articles, may introduce a degree of subjectivity and selection bias. To mitigate this, each co-author independently evaluated the articles, followed by discussions to reach a consensus. Furthermore, although the retrieved articles are classified based on the different stages of industrialized construction and targeted applications, providing  
Figure 1: Flowchart of literature review.  
a structured analytical framework, some articles encompass the applications of digital technologies across multiple stages. This complexity makes it challenging to categorize all articles into specific application areas. To address this, individual articles are classified based on their primary application scenarios.