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Abstract. The lack of interoperability between ICT systems is becoming more and more a bottleneck in the collaboration and co-operation of enterprises. Cooperating parties have to exchange business information and have to have the same understanding of the meaning of the exchanged information and to trust both the communication itself and the validity of its contents. The paper reviews two ISO standards, which are aiming on the interoperability issue comparing the different aspects of these standards and introduces a new work item in standardisation, which expects support from two current European initiatives on interoperability and others. The paper is intended to guide further standard developments by identifying current solutions and their relation with one another.

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Enterprise integration and enterprise modelling are gammg more and more importance in manufacturing engineering. However to guide the user through the rather complex tasks of enterprise integration and modelling both require sufficient methodologies. Methodologies in this area are very much process oriented following the life cycle concept which is very commonly used in systems engineering and product development. However, different methodologies place emphasis on different life cycle phases without identifying this emphasis explicitly. Process representation of enterprise integration and modelling methodologies enables identification of their compatibility and differences. Using CIMOSA as the modelling method process models have been created for several enterprise modelling methodologies.The paper intends to demonstrate the benefits of a common process oriented representation of modelling methodologies. It does not claim completeness and full correctness of the process models presented. Further work will be needed to capture all the details of the textual descriptions available today.