Instruments and Systems: Monitoring, Control, and Diagnostics Annotation << Back Concept and methodology of the integrated design of corporate information systems for global calculations environment Zykov S.V. Present-day corporations often operate quite a number of information systems based on heterogeneous approaches, methods and models. Under aggressive competition and fast data size increase, an integrated solution is required to uniformly handle these separate information systems. The approach is based on Internet portal technology. The paper presents methodology, models, and heterogeneous (ERP software, legacy information system) integration results.