Summary System Analysis and Design Chapter 12

Chapter 12
Object-Oriented Design:
Bridging from Analysis to Implementation

 OO Design: Process by which a set of detailed OO design models are built to be used for coding
 Design models are created in parallel to actual coding/implementation with iterative SDLC
 Agile approach - create models only if necessary. Simple detailed aspects don’t need a design
model before coding

Object-Oriented Program Flow
Three Layer Architecture




 Instantiation
 Creation of an object in memory based on the template provided by the class
 Method
 The function executed within an object when invoked by a message request (method call)

, Analysis to Design to Implementation:
Model Flow




Introduction to Design Models:
Class Diagram




Sequence Diagram