Business Process Model and Notation is a graphical representation for specifying business processes in a business process model.
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Function model
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In systems engineering, software engineering, and computer science, a function model or functional model is a structured representation of the functions within the modeled system or subject area.
Business Process Model and Notation
…Process driven messaging service Function model Functional software architecture…
Example of a function model of the process of "Maintain Reparable Spares" in IDEF0 notation.
Example of functional decomposition in a systems analysis.
Functional block diagram of the attitude control and maneuvering electronics system of the Gemini spacecraft. June 1962.
Functional flow block diagram format.