## 3 Results
### Thematic Analysis of Selected Articles
#### 3.2.2 Digital Building Logbook Applications in the Building Lifecycle Phase  
Considering the building's lifecycle is subdivided into four phases (design, construction, operation/building management, and end of life), each phase offers multiple opportunities for data collection and management [2]. In particular, the digital building logbook potential varies throughout each phase of a building's life cycle. This section offers a detailed analysis and overview of the growing uses of the digital building logbook in the construction industry, with a focus on the specific lifecycle phases. Table 5 shows the number and type of applications that are of interest in the various stages. Generally, the design phase is crucial for collecting data on the building's physical characteristics, including materials used and their locations. Although the digital building logbook can be useful at every stage of a building's life cycle, one of its most useful applications is in the design phase. The data highlight that 6 of the 25 analyzed papers exploit the digital building logbook in the design phase. During the design phase, the digital building logbook plays a crucial role in enhancing sustainability and circular economy practices in the construction sector. The digital building logbook can be used to store data on materials and components used in construction, facilitating the identification, recovery, and reuse of materials at the building's end of life [38; 43]. This promotes sustainability by contributing to the circular economy through efficient resource management and reduced environmental impact [38; 43]. The digital building logbook facilitates the systematic collection of design-related data such as architectural plans and engineering specifications, which are essential for creating a comprehensive design framework. By centralizing this information, the digital building logbook ensures that all stakeholders have access to the latest design updates and modifications [25]. To harness the potential of the digital building logbook, it can be integrated with other technologies such as BIM [44; 45; 47]. BIM is a collaborative way for sharing and managing multidisciplinary information throughout the building lifecycle, while the digital building logbook gathers and organizes critical building data, such as technical specifications and operational information [53]. Following BIM4 EEB implementation, these data can be integrated into or complemented by BIM, which creates a detailed, digital 3D model of the building. BIM enhances the digital building logbook by allowing for the creation, storage, and management of information about the building throughout its entire lifecycle [45]. During the construction phase, a significant amount of additional information is produced. A small number of analyzed papers take into consideration the potential of the digital building logbook during the construction phase. The digital building logbook could be useful in serving as an ideal repository for organizing and storing these data systematically, ensuring that maintenance activities and future interventions are informed and consistent with the building's history. The digital building logbook plays a vital role during this phase by enabling real-time data tracking, documenting changes, facilitating communication, ensuring quality control, and supporting data-driven decision making [44]. These functions contribute to a more organized and efficient construction process, ultimately leading to better project outcomes. The data collected help ensure compliance with regulations and certification schemes [25; 43; 44]. Data collection in the operation/management phase focuses on the building's operation and performance, covering aspects like maintenance, ownership transfer, and changes in use. The information is valuable for identifying renovation needs and monitoring user behavior. The data highlight that most of the analyzed articles explore the potential of the digital building logbook during the operation phase.