Developing or improving enterprise interoperability implies that the degree of interoperability can be measured, and causes identified and analysed. This paper aims at presenting an enterprise interoperability measurement approach developed within the frame of the two main European IST projects in this field: INTEROP NoE and ATHENA IP. Having given the basic concepts on enterprise interoperability, the paper focuses on presenting three kinds of enterprise interoperability measurements:

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... ability potentiality, interoperability compatibility and interoperability performance. Future works and perspective are discussed as part of conclusion.