1. Principles of Engineering System Design Dr T Asokan asok@iitm.ac.in

2. Principles of Engineering System Design Dr T Asokan asok@iitm.ac.in GRAPHICAL MODELLING TECHNIQUES

3. Asokan T ED 309 Process Modelling Data flow diagrams (DFD) – What processing is done? When, how, where, by whom? – What data is needed? By whom, for what, when? Basic constructs of DFD are: Function, dataflow, store, and terminator A process model basically defines the functional decomposition of the system function and the flow of inputs and outputs of a system

4. Data Flow Diagram for Design Process

5. Asokan T ED 309 N-squared (N 2 ) Charts: The N Functions that are partition of a higher level function are displayed along a diagonal of the diagram with N rows and N columns

7. Asokan T ED 309

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