A methodology for building an optimal enterprise architecture was developed to improve the efficiency of using information technologies in the digital industry, aimed at providing information support for production systems using modern integrated information technologies. The architecture is decomposed into a number of representations, which are chosen as invariant aspects determined by the analysis of various models of enterprise architecture. We propose to design of an information support subsystem for development of digital industry enterprise promising architecture as a practical tool. Its elements are formed in the field of information technology as a result, and a comprehensive indicator of the effectiveness of a given enterprise architecture is calculated. The modeled subsystem includes a module for storing and managing enterprise architecture elements, a module for storing and managing enterprise architecture selection criteria, a module for creating a promising enterprise architecture based on the implementation of its modeling algorithms, and a module for generating reports. The subsystem will enable the company to create the conditions for efficient creation and exploration of new types of scientific and technical products, timely to market these products, in particular, to ensure the export potential and import substitution and will reduce the duration of the production cycle, improve the effectiveness of in-service process equipment.

Keywords: enterprise architecture, digital industry, optimal enterprise architecture, information support subsystem