## 2 Literature Review Focusing on the Use of COBie Data from Architecture to Civil Engineering
(2012) conducted a comparative analysis of the COBie-required information for one domestic university facility management system and one office building maintenance system, suggesting a significant consistency between the COBie-required information and the maintenance-system-required information derived through experts; furthermore, case analysis of BIM-based maintenance research has recently begun in the civil engineering field [6]. [PERSON] et al. (2011) presented the feasibility of a BIM application for maintenance, by constructing a 3D model of a bridge structure and implementing a function to store and retrieve maintenance data for the 3D members [11]. [PERSON] et al. (2012) described how the identification of an application model, the standardization of the maintenance information system, and the reorganization of the system were prerequisites for applying BIM technology to maintenance in the civil engineering field [12]. [PERSON] et al. (2017) conducted a study into the generation of COBie-based railway track maintenance documentation [13]. [PERSON] et al. (2020) studied the development of a BIM-based platform to manage information generated from port facilities, in terms of life cycles [14]. However, among the civil engineering fields, relatively few attempts have been made to apply BIM to ports, when compared to other fields such as roads and railroads. Very few new projects are associated with ports (as compared to other projects); furthermore, once a facility is built, it tends to be used for a long time. Therefore, the maintenance of port facilities is particularly important and essential ([PERSON] et al., 2020) [14; 15]; however, such maintenance is manually performed by humans, and the systems and information required for maintenance have not been standardized either. As a result, problems have arisen when linking the operation system with those previously developed. Therefore, this study aims to build a technology that allows port maintenance information to be shared and utilized via exchanges among the systems, subjects, and functions within the port BIM platform. In this study, a port BIM-based maintenance data standard format, port COBie, is developed; then, a data exchange process for port COBie is developed by analyzing the processes of COBie data creation, conversion, implementation, and management, using existing research and commercial BIM software. This suggests a method for exchanging maintenance information between the port maintenance system and port BIM platform, thereby allowing the maintenance information for each facility and member to be verified through the port BIM viewer. Section 3 analyzes the concepts and schematic structure of the existing COBie, as well as the COBie system currently in commercial use at home and abroad; this section will also detail how to create and use COBie data and the data processing mechanism. Based on the analysis of the existing COBie, Section 3 proposes a COBie schema and spreadsheet that can be used in the port sector. Section 4 implements a system that can utilize port COBie data in the BIM environment, using the port COBie format proposed in Section 3.