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Principles of Engineering System Design

Principles of Engineering System Design. Dr T Asokan asok@iitm.ac.in. Principles of Engineering System Design. GRAPHICAL MODELLING TECHNIQUES. Dr T Asokan asok@iitm.ac.in. MODELLING TCHNIQUES. Data Model : Relationships between data entities.

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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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