# Smart Facility Management System Based on Open BIM and Augmented Reality Technology
## 5 System Development and Validation
### Case Study Using a Prototype AR-Based Smart FMS  
A demonstration of the AR-based smart FMS was conducted after specifying a target building. To evaluate the viability of the proposed AR-based smart FMS, validation work took place using a real-world case project. The BIM data at the time of handover for an actual building (shown in Figure 13) was obtained, and the COBie data was automatically extracted via Revit add-ons. Then, the additionally required dataset items were configured separately and utilized for web-based AR data.  
Each menu option of the web-based AR data was made visible when the marker was recognized through the camera module of a smart device. The prototype consisted  
Figure 12: Information flowchart of AR-based smart FMSs.  
Figure 13: BIM data of actual building used for the case study.  
of a functional UI required for actual maintenance work in order to increase practical availability. The on-site inspector selects the inspection type from the inspection menu and confirms the sensor information of the space and the checklist of the inspection target. Then, the attribute information of the member to be inspected can be confirmed. When reporting a defect, we implemented a photography function, a BIM model confirmation function and a contact function with the person in charge. In the history information view menu, the maintenance history can be viewed, and warranty-related matters can be checked. When repair work is carried out, the contract document can be viewed, and the work status can be selected to record the recorded items, and when completed, the photo data is saved. Figure 14 shows the screenshots of the prototype AR-based smart FMS actually running. As shown in Figure 14a, the starting menu consists of four options--'Inspection', 'Report defects', 'Check history' and 'Repair work'--and each menu has submenu options. Within the 'Inspection' submenu, 'Inspection type' allows selection of the type of inspection from daily, periodic and report reception of the defect (Figure 14b). The 'Sensor' submenu visualizes the sensor information within the space being inspected (Figure 14c). In the 'Check list' submenu, a checklist entry for the member to be inspected appears, while clicking on the 'Property' submenu shows the attribute data for the member being inspected (Figure 14d,e). The 'Report defects' option allows for taking and transmitting image information, checking the BIM model information and real-time connection with the staff, and it includes three submenu options: 'Photographing', 'Check the BIM model' and 'Contact with staff' (Figure 14f-h). The 'Maintenance history' submenu under the 'Check history' option displays the maintenance history track record information on the screen, while the 'Department/Company' submenu provides information for the responsible department and company (Figure 14i,j). The 'Warranty Check' feature also provides a menu that allows the viewing of warranty-related documents and contents (Figure 14k). The 'Repair work' option consists of four submenus that include 'Contract document', 'Work status', 'Records' and 'Complete inspection'. The 'Contract document' function provides access to contract-related documents for the repair work, and 'Work status' provides the option to select the progress (e.g., scheduled, progressed and completed) of the repair work (Figure 14l,m). The necessary records for repair work progress and completion can be stored in the 'Records' submenu, while 'Completion inspection' allows for the storage and transmission of information regarding the condition at the time of completion in an image format (Figure 14n,o).