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===Integrated DEFinition===
[[IDEF]] is a [[structured modeling]] technique, which was first developed for the modeling of manufacturing systems. It was already being used by the U.S. Airforce in 1981. Initially it had 4 different notations to model an enterprise from a certain viewpoint. These were [[IDEF0]], IDEF1, IDEF2 and IDEF3 for functional, data, dynamic and process analysis respectively. In the past decades a number of tools and techniques for the integration of the notations are developed in an incremental way.
IDEF clearly shows how a business process flows through a variety of decomposed business functions with corresponding information inputs, outputs and actors. Like CIMOSA, it also uses different enterprise views. Moreover, IDEF can be easily transformed into UML-diagrams for the further development of IT systems. These positive characteristics make it a powerful method for the development of Functional Software Architectures.
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