Investment and construction projects (ISPs) are a complex set of individual business processes that require significant funds, time and human resources. The main task of each ISP customer is to reduce these costs while maintaining the quality of the project. Currently, digital technologies are successfully used for this purpose, which reduce its cost at each stage of the development of the ISP. However, it is necessary to take into account a number of problems that are characteristic of modern systems of digitalization of design processes. Such problems include: a limited choice of specialized software products on the Russian market; the lack of a clear mechanism for the interaction of several software products designed to solve technical, technological and economic problems of ISP; a low level of adaptation for building a BIM model; lack of effective tools for processing large amounts of information.Solving such problems is a complex and multi-vector task.

Keywords: resources, database, key project indicators, hierarchy analysis method

The design of new buildings and structures is currently a complex and multifunctional process divided into several main stages. A large number of design organizations engaged in the development of large investment and construction projects are constantly improving their activities in order to optimize production costs and increase the efficiency of design solutions. The development of new approaches that are beginning to be applied in design is very slow, which is explained by several reasons. These include a narrow range of software, the lack of a methodology that combines digital technologies and the principles of "lean" construction, which provides savings in consumed materials and resources, as well as shortening the design and construction of the facility. In this regard, consideration of issues related to the development of a new concept combining the principles of digital design and "lean" construction is currently very relevant.

Keywords: lean construction, digitalization, project, building, design

Currently, the processes of designing buildings and structures are becoming more costly, as they require the involvement of more specialists, material and technical resources and a reduction in the calendar time of work. At the same time, the customer of the project requires optimization of design solutions in order to preserve the quality of the work carried out. In this regard, there is a need to develop a special design methodology, based on which it is recommended to use the principles of "lean construction", which can reduce the Customer's losses during project development.

Keywords: project, building, construction and installation works, losses, work schedule