This article propose the approach, which provides the synchronization of the upper level of business architecture models and IT-architecture models. The transitional buffer layer is the central element of the proposed approach, which was named by the authors the transformational layer. It is proposed to execute the transition to the descriptions of the information systems by means of transformational layer via the functional interface. The described approach allows the solution of the principal

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... task of the end-to-end tracing of the information system functions realization from the business architecture level to the application solutions level and the real elements of the system. The proposed approach can be used in designing information systems, transformation of the business models and the development of proactive initiatives concerning the updating of enterprise activity and the search of «bottle necks» in part of the automation. The application of the described approach in this work allowed the increase in efficacy of the support and development of the information system in big logistic company, occupying the leading positions in the market of RF and CIS countries, by means of incorporation of the new pattern of software requirements specification.