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One Model, Many Interests, Many Views
Mapping for the IDEF0 Diagram
On an IDEF0 diagram, the subfunctions are shown as nodes on the main diagonal. For each functional
node:
• Inputs enter on the left. These can either come from the edge of the diagram (external
inputs) or from another function on the diagram.
• Controls (triggering data) enter on the top. These can either come from the edge of the
diagram (external triggers) or from another function on the diagram.
• Outputs exit on the right. Outputs can either connect to another function on the diagram,
exit to the edge of the diagram, or both (representing an output that is input to / triggers both
internal and external functions).
• Mechanisms (allocation) enter on the bottom.