## 3 Results
### PHASE 3--Application for the 3D Simulation of the Maintenance Management of the Building Facilities  
#### 3.3.1.  
Step 1--Define Assets, Spaces, and Systems/Subsystems  
The BIM model previously modeled in Revit 2019 is reused through the captured field data. The assets, spaces, and systems/subsystems that were worked with in this  
Figure 16. Shared parameters of BIM model envelopes. (**a**) Creation process. (**b**) Feeding and querying.  
Figure 15. Preliminary BIM model input. (**a**) Preliminary feeding of the BIM model: examples of creation and edition of furniture and equipment families. (**b**) Equipment of the first floor of the building (authors’ elaboration with _eveSIM_ software, version 4.2.4.585 [29]).  
application case correspond to those of the first floor of the building, namely, plumbing fixtures (sinks, toilets, urinals, etc.), boiler room, furniture (desks, chairs, etc.), and some electrical devices (control panels, light fixtures, etc.).  
3.2 Step 2--Link and Configure a Three-Dimensional Computer-Aided Maintenance Management System (CMMS-3D) and List the Stakeholders  
A direct link with the text \"click for CMMS\" was added to the pop-up windows _ArcGIS Pro_ in order to access the building asset information (Figure 17a). In this simulation the CMMS _YouBIM_ software [30] is used. The integration of the BIM model to the CMMS is developed in three stages conditioned by _YouBIM_ (Figure 17b).  
In the first one, _Classification of systems/subsystems in the Revit BIM model_, this classification is applied directly to the set of assets (appliances) during their modeling in the BIM software. Several assets are selected and grouped, to which a \"name and classification\" are assigned, thereby forming the system. Figure 18a illustrates part of the classification process of the sanitary system in the bathrooms located on the first floor of the Civil Engineering School in _Revit_ (labeled sanitary 1, sanitary 2, and sanitary 3), while Figure 18b shows the exploded view of the boiler system and subsystem of the building, as viewed with _eveBIM_ software [29].  
Figure 17: (**a**) Configuring the roof pop-up to add access to the CMMS. (**b**) Integration process of the BIM model with its data (COBie-Excel) to the YouBIM CMMS.  
Figure 18: MEP (mechanical, electrical, and plumbing) modeling and system design for the Civil Engineering School. (**a**) Layout of sanitary fixtures in the men’s restroom located in the building’s hall, illustrating the arrangement and integration of various components. (**b**) Exploded view of the boiler system and its subsystems within the same building, offering a detailed perspective of the components and configurations to enhance understanding of the system’s functionality and design.  
In the second stage, _COBie file generation from Revit to Excel_, the standard format for linking a BIM file to a CMMS application is COBie (Construction Operations Building Information Exchange). To generate COBie data, automation was implemented through the interoperability plugins of the BIM application used for the federated model (in this case, Revit). Finally, in the third stage, _Linking 3D BIM Model (Revit) + COBie File (Excel) + CMMS (YouBIM)_, before linking the BIM file (Revit) and the COBie file (Excel) to the CMMS (YouBIM), the latter is configured in the cloud to host the data to be imported. Once this configuration is complete, the Revit BIM model and the COBie (Excel) file can be uploaded to the CMMS YouBIM application via the Revit YouBIM plugin. After the plugin process is completed, the final CMMS 3D model can be viewed and navigated, and the information content of the assets previously selected to populate the COBie can be accessed, as shown in Figure 19.