## 4 Implementation  
### Implementation Process for COBie Data Input System Based on Port COBie Schema  
The purpose of this section is to develop a system that allows the developed port COBie to be inputted as digitized information in the BIM environment. For the purpose of developing the system, the data processing mechanism of the existing commercial COBie systems analyzed in Section 2 was referred to. Since COBie has not been applied to a port, all commercial systems included in the analysis were from the architectural field. Seven COBie systems were included in our analysis. The commercial COBie systems allow data to be inputted at each phase rather than throughout the entire construction life cycle  
Figure 8: Configuration of port BIM-based COBie schema.  
Figure 7: Configuration of port BIM-based COBie worksheet.  
(planning, design, construction, and operation). For instance, dRofus allows the COBie data required for future operation to be inputted in the planning phase of the project; likewise, AECoSim Building Designer and Revit, cBIM, and AiM allow the input of COBie data in the design, construction, and maintenance operation phases, respectively. Onuman System and EcoDomus System allow COBie data to be input throughout all phases of the project. Each system has a different COBie data processing method. However, the COBie data generation and processing procedures are largely classified into three categories: (1) methods that bring COBie data into the system, by installing the plug-in service of the system in a BIM environment such as Revit; systems such as dRofus, Onuma System, and EcoDomous use this method (Table 2). (2) Methods of importing the BIM model (converted from BIM software into an IFC file (the standard format for open BIM)) into the system and creating COBie data through the system process; AECoSim Building Designer uses this method. (3) Methods of manually entering data into a COBie spreadsheet, converting it to XML format, and importing it into the system; early COBie systems used this method, but it has since become unpopular. Commercial COBie systems have their own procedures; however, this requires data to be imported from the BIM model to the specific system. Therefore, this study intends to create an environment in which COBie data can be directly inputted, without requiring other intermediary systems in the BIM environment. In order to supplement the limitation of the existing systems, this study intends to implement the port COBie system by converting the COBie data into the data of the BIM model in the BIM environment. Since BIM data are generally built in the BIM environment in the form of parameters, the port COBie data are also stored in the BIM environment in the form of parameters. In addition, by analyzing the attributes of each port COBie sheet, the part that automatically receives data in connection with the parameters of the existing BIM model and the part where the user must directly input data for port facility maintenance are distinguished. The port COBie schema implementation system is developed through visual programming, Dynamo. Dynamo is also used to perform actual data input simulation of the developed system. The following Figure 9 includes the system implementation procedure and simulation procedure as the system implementation methodology of this study.