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