Flexibility is the ability of a system to respond to changes in the external environment. To ensure the progress and implementation of large-scale projects, they as systems must have the ability to promptly respond and adapt to changes in the environment and requirements. Resources are limited in the implementation of large construction projects. If the cost of construction increases to such an extent that the customer or investor cannot cover it, then the implementation of such a project becomes impossible. Similarly, it is necessary to control the timing and efficiency of construction. Thus, under conditions of limited resources, the efficiency of their use and management determines the success of the project and the achievement of the set goals. Communication and regulation of relationships between members of large design organizations, the efficiency of information transfer and the ability to share resources by participants play an important role in flexibility in project implementation. Flexible management of organizational structures effectively solves problems such as changes, conflicts, risks, etc. Based on the theory of flexibility, this article analyzes how, through coordinated work, difficulties and problems in the construction process are effectively solved in large-scale project organizations, how the implementation of set tasks is controlled.

Keywords: large-scale projects, flexibility, organizational structure, management

The situation of occurrence, identification and management of risks arising during the construction process is analyzed. Uncertainty of decision-making in construction projects involves the creation of methods that ensure the reliability of decisions and their effectiveness. Such a method was developed in the Russian Project Management Association. The paper provides an example of using this method on a real construction site. An analysis of risks arising during the implementation of a construction project was conducted, a risk map was created for this project and the PERT method was applied when creating a calendar plan.

Keywords: uncertainty, risk event, probability, risk, damage, danger, reliability, risk analysis, investment and construction project, PERT method

This article is devoted to the analysis of the application of the software and hardware complex of mixed reality and augmented reality ""BRIO MRS"" to explore the possibility of digitalization of the construction control process within the framework of JSC CITY - XXI Century. The article also discusses the specific application of mixed reality, which consists in checking the progress of work on the construction of a real building and its compliance with the designed digital information model using a hardware and software complex for augmented and mixed reality. The complex described in this article was actually used and is being used at the construction site. The paper describes the procedure for using a hardware and software complex to verify the compliance of the progress of construction work and the digital information model. The principle of operation of the complex, as well as the prospects that were discovered during the implementation of the experience of using a mixed and augmented reality system, are the subject of further research. In conclusion, based on the conducted research, it turns out what tasks the complex described in the article allows to solve, what advantages it has over analogues and what advantages its introduction into the activities of a modern development company will bring.

Keywords: mixed reality, augmented reality, digitalization, digital information model, modern standards, hardware and software complex, construction control