# Systems Engineering Methodology for Designing Digital Public-Private Partnership Platforms
## 5 Conclusions  
The main goal set in the article, the formation of a framework for the development of a digital PPP platform taking into account the interests of the parties involved, has been achieved.  
The paper presented the concept of developing a digital platform used in major projects through public-private partnerships. A framework for developing this platform using the practices and tools of systems engineering was proposed. According to the systems engineering methodology, a circle of interested parties (subjects) was determined based on which the types of needs were formed.  
The selected groups (or types) of needs will subsequently make it possible to formulate requirements on the part of stakeholders for the designed digital platform for PPP, which will determine the future set of tools when shaping its architecture.  
Such an approach in the development of the DP for PPP will allow the interests of those involved in the project activities to be taken into account and will create opportunities for the prompt and high-quality selection of contractors.  
It is also important to note the contribution of this study to the development of the existing scientific context in the following two areas:  
1. The paper contributes to the development of digital PPP tools through digital platforms. For this purpose, the concept of the DP has been proposed, for which important work has been done to identify a wide range of PPP stakeholders influencing the success of the project, as well as their needs. The aggregate needs (Figures 2-6) will allow the selection of the necessary set of tools for the DP. This approach will allow the design of the DP so that its participants benefit the most from satisfying their needs.
2. Moreover, the results of this study contribute further to the development of PPP as an approach to the organization and implementation of major projects. It lies in the application of system engineering practices to expand the understanding of PPP stakeholders in projects. The paper proposes identifying PPP parties to determine their needs and to create harmonized requirements for the project and its results. At all stages of the project's lifecycle, these requirements need to be taken into account, and the proposed solutions need to be checked for consistency with them. The digital platform is designed to support this work.  
The results listed in the article can serve as a foundation for direct interaction with the identified stakeholders and detailed determination of their requirements for the DP. Further work with stakeholders will determine the functional architecture and physical implementation of the future DP.  
Conceptualization, I.N.G.; methodology, I.N.G., L.A.T., and O.A.u.A.; writing --original draft preparation, O.A.u.A.; writing--review and editing, I.N.G. and L.A.T.; visualization, O.A.u.A.; funding acquisition, L.A.T. All authors have read and agreed to the published version of the manuscript.  
Preparation of this article was supported by the RFFI grant No. 19-010-00975.  
Not applicable.  
Data Availability StatementData is contained within the article.  
We are very grateful to anonymous reviewers for their insights and guidance.  
The authors declare no conflict of interest.