Lecture 6 - Modeling Techniques

Lecture 6 - Modeling Techniques

1. Data-flow Models(DFD)

   • Graphically Represent
     • External entities
     • Processes
     • Data-flow
     • Data Stores

2. Object Oriented Model

   • Object - Major actors of system
     • Analyse domain
   • Basic Concept
     • Encapsulation
       • Prevent unauthorised access of data
       • Packaging of data and operation
     • Inheritance
       • Lower level object inherits from parent
   • Class - Implementation of an object
     • Object share common attributes

3. Entity Relationship Model

   • Show the relationship between different entity