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Principles of Engineering System Design

This document provides an overview of graphical modeling techniques essential for engineering system design, focusing on data, process, and behavior modeling. Key methodologies discussed include Entity-Relationship (ER) diagrams to illustrate data structures and relationships, process models to define actions and sequences, as well as behavior models for system function management through tools like FFBD and Petri nets. Learners will gain insights into creating complex ER diagrams, understanding entities and their interactions, and applying these concepts to real-world engineering challenges.

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Principles of Engineering System Design

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

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

  3. MODELLING TCHNIQUES • Data Model : Relationships between data entities. Ex: ER Diagrams, Higraph • Process Model : Modelling of processes: what, when.. Ex: Data flow, N2. • Behavior Model: Control, activation, termination of system functions Ex: FFBD, Behavior diagrams, Petrinets

  4. DATA Modelling • Entity Relationship Diagrams • Models the data structures or relationships between data entities ( An entity is a class of real, similar items like people, computer, books etc.) • Creating ERD • Identify the entities • Determine significant events • Analyse nature of interactions • Draw ERD • Complex ER Diagrams

  5. Higraphs Higraphs are generalisation of complex ER diagrams. An entity is considered to be a set with multiple elements, called a blob

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