Boxes within a diagram show the sub-processes of the parent process named by the diagram. An IDEF0 activity diagram contains one level of decomposition of a process. IDEF0 was initially created at Northrop Corporation in 1966, and first available commercially by SofTech in 1972. IDEF0 diagram was originally used to apply structured methods to better understand how to improve manufacturing productivity. Air Force Program for Integrated Computer-Aided Manufacturing (ICAM) standardized and made public a subset of SADT, called IDEF. have refined and used SADT in a wide variety of problems. Since then, system analysts at Softech, Inc. IDEF is based on the Structured Analysis and Design Technique (SADT), a graphical approach to system description, introduced by Douglas T. IDEF0 Diagrams Software - Create IDEF0 diagrams and business diagrams rapidly with rich examples and templates.
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