principles of engineering system design
DESCRIPTION
Principles of Engineering System Design. Dr T Asokan [email protected]. Principles of Engineering System Design. GRAPHICAL MODELLING TECHNIQUES. Dr T Asokan [email protected]. MODELLING TCHNIQUES. Data Model : Relationships between data entities. - PowerPoint PPT PresentationTRANSCRIPT
Principles of Principles of
Engineering System DesignEngineering System Design
Dr T Asokan
Principles of Principles of
Engineering System DesignEngineering System Design
Dr T Asokan
GRAPHICAL MODELLING TECHNIQUES
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
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
HigraphsHigraphs are generalisation of complex ER diagrams. An entity is considered to be a set with multiple elements, called a blob