# Framework for BIM-Based Repair History Management for Architectural Heritage
## 5 Development of a BIM-Based Repair History Management Framework  
When designing a system for maintaining architectural cultural heritage based on BIM, it is crucial to include shape and property information, including the collection, processing, and management of repair history records for each part. Integrating the asset information generated during a building's lifecycle into BIM and collecting, selecting, mapping, and validating the property information necessary for subsequent maintenance can enhance the quality control of buildings and facilitate the effective management of aging facilities, as demonstrated in Section 4. For wooden architectural heritage with numerous parts, developing a system that digitizes repair history records accumulated over time and inputting them into the established BIM model is essential. Figure 4 shows the BIM-based architectural cultural heritage maintenance system to which repair history records are applied, as proposed in this study. In the data collection and selection stage, the database manager collects, analyzes, and manages data on architectural heritage; in the data mapping stage, the BIM team integrates maintenance data to build integrated HBIM based on the data; in the managing sustainable repair records stage, maintenance is conducted through the validation stage of the produced integrated HBIM data. This maintenance database is built by analyzing shape information, such as drawings, photos, and 3D scans of architectural heritage, as well as the property information necessary for maintenance (Section 5.1). The HBIM standards, defined by the Cultural Heritage Administration, provide guidelines for defining the level of detail (LOD) and level of information (LOI) for each part. The LOD serves as a standard for building formal content and is intended to be an as-constructed asset information model, while the LOI serves as a standard for creating non-formal content such as a repair history DB.  
The BIM team integrates the repair history for each part, which is stored in the repair history DB created by the DB manager, into the property information for each part in the BIM model. This process involves converting the part object name of each part into a standardized object classification code (Section 5.2.1), creating a data container to link the repair history record to each part of BIM (Section 5.2.2), and linking with the repair history DB (Section 5.2.3). The resulting updated attribute information of HBIM can be exportedas a spreadsheet containing the repair history record and used to produce visualization information for maintenance. Furthermore, the effective interoperability of HBIM data through an IFC viewer can be achieved by exporting from BIM to IFC and conducting model-based consultations among project participants.  
This study constructs integrated HBIM by mapping the information from the repair history DB built by the DB manager from the stages described above with the parts of BIM. The following sections provide a detailed description of the data flow and processing for system development at each stage of data collection and selection, mapping, and validation.