ON THE DIAGNOSIS OF ENTERPRISE ARCHITECTURE
Diagnostics is a tool of objective expert examination, which has the purpose of providing enterprise management bodies with qualitative and systematized information about the actual state of the diagnostic objects and prepare the information basis for preparing proposals for promising directions and ways of their improvement and integration. Enterprise architecture is an interrelated set of principles, methods and models used in the design and implementation of the organizational structure of the enterprise, its business processes, information systems and infrastructure. The purpose of the article is to study and clarify the methodology of enterprise architecture diagnostics, to reveal the interrelation of enterprise architecture, business architecture and IT architecture. Construction of business architecture is to identify and optimize the business processes of the enterprise, definition of their functions and characteristics, development of methodology, which ensures their implementation. Improvement of business-architecture provides increase of effectiveness of management decisions, based on it, and, as consequence, increase of return on investment from use of management information. Achievement of optimum indicators of enterprise activity, combining a high level of return on investment and a low level of expenses, is possible only at creation of effective architecture of the enterprise - system in which the unity of business-architecture and IT-architecture is provided. With this unity the IT architecture fully ensures the formation of necessary management information, and business architecture uses information technology to the maximum extent possible. The article describes relationship between enterprise architecture, business architecture and IT architecture, and their influence on the level of return on investment from the use of management information and the level of cost reduction. The article also describes methods that are proposed for use in examining the components of the objects of diagnosis, which have practical value. Improvement of IT-architecture provides improvement of efficiency of managerial decisions, reducing the time and labor costs for their adoption and, consequently, the overall cost reduction of the enterprise.