## 3 Research Process  
The objective of generating preliminary design concepts for vernacular-inspired structures using BIM necessitates a systematic and rigorous research process to ensure effective data collection, analysis, and modeling. The proposed methodology, illustrated in Figure 1, comprises four sequential steps: (1) data collection, (2) analysis of structural components, (3) authoring of a BIM structural components library, and (4) development of automated configuration algorithms. This process begins with collecting VVA data, focusing on distinctive roof forms (Top Roof, Side Roof, Veranda Roof) and their dimensions to establish a foundation for analysis. The second step involves a detailed examination of vernacular structural components to define their characteristics for accurate BIM representation. The third step utilizes Autodesk Revit to construct 3D models of these components, adhering to BIM protocols to ensure precision and forming a structural framework for multi-bay configurations. Finally, an automated modeling system is developed using Dynamo within Revit, where scripts automate repetitive tasks, such as generating roofs, columns, and beams, enhancing efficiency, minimizing errors, and enabling parameter-based adjustments. The resulting 3D model supports data export as spreadsheets, facilitating subsequent design stages and fostering innovative design ideation grounded in VVA principles.  
To effectively apply this study's approach, source materials were meticulously selected based on three specific criteria, ensuring the accuracy and cultural relevance of data for VVA. First, all documents were exclusively sourced from reputable, high-quality academic publications, including scholarly journals, books, and proceedings from specialized organizations dedicated to architectural heritage, guaranteeing the information's reliability and authoritative nature. Second, the selected materials were rigorously required to comprehensively address traditional Vietnamese architecture, encompassing its historical evolution, cultural significance, and critical technical and structural dimensions to provide a holistic understanding of VVA. Third, preference was given to recently published works to align with contemporary research contexts and ensure maximum relevance. This criterion also implicitly addresses the inherent limitations often found in older or foreign-language  
Figure 1: Research process.  
materials, which frequently lack the necessary depth of cultural nuance and localized technical knowledge crucial for accurately representing VVA. Furthermore, contemporary and locally accessible publications are more readily available to Vietnamese researchers and practitioners engaged in heritage preservation and design innovation.  
The selection of Autodesk Revit 2025 and Dynamo v.3.3.0 as the primary tools for this study was driven by their unique capabilities to address the specific requirements of modeling and automating VVA-inspired conceptual designs. Revit was chosen for its robust BIM framework. It supports parametric modeling and ensures precise representation of complex vernacular structural components, such as intricate roof systems and timber frameworks, while maintaining interoperability with other design tools [53, 54]. Dynamo, a visual programming extension for Revit, was selected for its ability to automate repetitive tasks, such as generating multi-bay configurations, through customizable scripts, thereby enhancing efficiency and reducing modeling errors. Dynamo's seamless integration with Revit provides a more streamlined workflow for BIM-based conceptual design, enabling rapid iteration and parameter-based adjustments critical for exploring vernacular-inspired architectural solutions.