Disseminating detailed and accessible information about the built heritage is fundamental to help understand the value and meaning of that heritage to society. Recent research highlights the potential of the Historic Building Information Modeling (HBIM) system for managing and disseminating heritage. However, this area is still in an early stage of development. This study aims to present a state-of-the-art review on the use of HBIM for both disseminating the value of historic architecture and managing the public use of heritage assets. The research methodology consisted of extensive bibliographic computer database searches of the study topic through specialized search tools. To this end, significant keywords have been used, such as HBIM to culture dissemination, HBIM to ICT and HBIM to public use management, among others. A total of 85 papers were initially selected. After a preliminary reading, 37 studies have been selected for this review. Later, a quantitative and critical analysis identifying the main themes and perspectives of these academic papers has been carried out. The results indicate that technological solutions have been developed to convert HBIM into models suitable for portable devices, the purpose of which is to offer virtual tours (VR) and augmented reality (AR) applications, as well as architectural heritage maintenance applications. There are also gaps in knowledge that have allowed us to establish a starting point for future research. As a conclusion, we can advance that it is essential to further the heritage interpretation of HBIM information so that the non-expert public can better understand architectural assets and their history. Also observable is the need for optimizing HBIM processes for heritage diffusion and public use management. Finally, we also noted it would be very useful to identify the most efficient way of collecting and processing data in order to achieve the best HBIM technical information for dissemination purposes.

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The consolidation of BIM work environments and the efficient management of construction information are reaching previously forgotten facets of the buildings' life cycle. Preventive conservation and maintenance, which affect the building operation that accounts for 80% of CO2 emissions, are being subject to an improvement in their procedures based on the digitization of information. These actions are reaching historical buildings where procedures are not only being developed to improve their maintenance, but also in areas such as historical documentation and cultural management. The generation of repositories with documentation of the buildings is making it possible to establish new relationships with society, improving the conservation of buildings and designing actions that avoid future risks. There are different types of maintenance: corrective, preventive and predictive and despite its advantages, the agents in charge of these buildings do not always perform it properly. Furthermore, dysfunctions and lack of coordination are detected as many agents act without having adequate information. To solve these problems, BIM work environments are positioned as a valid alternative since they provide a centralized and updated repository where the information is arranged so that it is available to the different agents when they need it. This information can be historical or technical, including digital models and evaluation of deterioration and intervention processes. The objective of this research is the development of an analysis of the degree of implementation of BIM strategies applied to preventive maintenance in historic buildings and the analysis of the investigations carried out. This work is part of the first results of the research project entitled "Analysis and Development of the integration of BHIM in GIS for the creation of a tourist planning protocol of the cultural heritage of a destination (HBIMSIG-TOURISM)" granted by the Ministry of Research of Spain under the 2020 call for R&D&I Projects oriented to the Challenges of the Society with the reference PID2020-119088RB-I00.

Abstract. Providing public access to heritage promotes a social interest in its conservation but, at the same time, it poses a risk to the conservation of resources. The biggest challenge in managing public use of heritage is to establish a sustainable relationship between heritage and tourism. The multidisciplinary teams involved in visitor flow management generate and exchange information about the heritage property without an integrative vision. The lack of a reliable, unified and up-to-date source of information generally hinders decision-making, causes errors and leads to inappropriate practices in heritage visitor flow management, thereby putting the conservation of resources at risk because of the impacts derived from visitation while the quality experience is also affected. Building Information Modelling (BIM) provides a collaborative framework where multidisciplinary teams share geometric and documentary information about the building in a coordinated way. This tool applied to heritage (HBIM) is demonstrating how it is able to improve efficiency in documenting, intervening and managing heritage. Beyond these aforementioned skills, the objective of this study is to identify the potential of HBIM to improve the efficiency of the visitor flow management. The methodology includes a literature review, qualitative data collection and technical documentation analysis. The results indicate that the use of HBIM can optimise the planning and management of visitor flows, by virtually foreseeing the possible risks derived from visits. It can also calculate recreational carrying capacity and analyse alternatives to itineraries that minimise the deterioration of the most fragile spaces.

The Master Plans (MP) used for Architectural Cultural Heritage conservation require specific standards for the documentation process. They must facilitate the achievement of the intended objectives about the knowledge acquisition and conservation of the building assets throughout the entire building lifecycle. Over time, the documentation of an MP, once the heritage building is under use, tends to become dispersed and the documentation generated during the building use is rarely introduced in the MP. Therefore, this contribution has the following objectives: 1) study of the requirements of MP deliverables; 2) study of the maturation requirements of the documentation processes and deliverables that are generated when applying the Building Information Modelling (BIM) methodology to an MP; 3) investigate if the application of the BIM strategies are suitable to respond to the needs of an MP in such a way that knowledge and conservation of heritage buildings are achieved; 4) verify that the exchange of information and the collaborative work among the different disciplines that generate documentation and deliverables guarantee a single, comprehensive, open, three-dimensional, and clear repository.