The article reveals the interoperability of several software products. The concept of interoperability of software products is supported by OpenBIM standards, providing a project with a reliable platform and open source code for integrating BIM models with other environments. It is possible to exchange data between software systems, not only through the IFC format, in the article we will consider other means of information exchange. An algorithm is formed that optimizes the number of the number of reinforcing bars in the slabs. The optimization is possible due to the interaction of different software systems through plugins.

The problems of effective investment in social infrastructure have a contradiction between the need to expand the functions of social infrastructure in the information society and, as a result, the potential increase in the cost of this state investment projects. Based on the in-depth interview method, we prepared questionnaires for several interviews with industry experts to identify the transaction costs in the construction industry. The results of the research represent technical and organizational innovations that reduce the transaction costs of investment projects for the development of social infrastructure during the life-cycle of an object. We tested our hypothesis on the example of building a multilingual school in Kazan and gave a classification of transaction costs in the construction industry. The proposed method of reducing transaction costs of an investment project for the development of social infrastructure, based on buildings information modeling, allows solving the problem of high-quality public buildings cost-effective construction and the creation of public goods in the region.

Introduction: The paper presents a methodology for reduction of expenses within investment projects aimed at the preservation and development of cultural heritage sites, based on the combined use of methods of scientific restoration, laser scanning and information modeling, as well as creation of a library of unique BIM elements of ancient city buildings, identified at protected sites of the urban environment, using restoration of a building in the Old Tatar Quarter (Staro-Tatarskaya Sloboda) in Kazan as an example. Methods: The authors performed standard (traditional) scientific restoration activities and innovative field studies using laser scanning and built a parametric information model of the cultural heritage site for further development of a restoration plan with account for site adaptation to modern functions. Results and discussion: Point cloud processing is carried out to create an information model and a library of unique BIM elements, which can be used repeatedly in restoration and reconstruction, thus reducing costs for BIMmodel development in future investment projects. The practical significance of the study lies in the creation of a public good-a library (encyclopedia) of ancient architectural elements in the form of a library of BIM elements for BIM models of architectural and urban-planning landmarks in the region, as well as in the development of recommendations (by individuals, regional and local regulatory authorities) for an efficient policy in urban planning and restoration with regard to similar historical and cultural, architectural and urban-planning landmarks.

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