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Object Oriented Analysis

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Object Oriented Analysis


What is object oriented analysis

  • Under standing the requirements from the perspective of classes and objects found in the vocabulary of the problem domain.
  • Coad and Yourdon

– Class hierarchies, attributes and services

  • Rambaugh

– Dynamic aspects: Behavior models

  • Jacobson

– Use-cases


[pic 1]

Major Steps/ Sub steps in

Useful tools/ Approaches for

OOA

the Steps

1.

Get user requirements

•Use cases – The narrative

description of the domain

process

2.

Build the structure of an

•CRC methods and diverse

domain model

perspectives

•Identify objects

•Static structure diagrams

•Identify relationships

(class diagrams)

between objects

•Various judgment based

•Identify attributes

guidelines

3.

Model system behavior-I

•Various judgment based

•Identify system events and

guidelines.

system operations

•System sequence diagram

•Write contracts for each

•Pre- and post-condition

operations

state changes


[pic 2]

Major Steps/ Sub steps in

Useful tools/ Approaches for

OOA

the Steps

4.

Review and change if

•Revisit use cases

necessary:

•Use Includes relationships

•Add new functionality.

•Develop real use cases

•Relate use cases

•Extend the object model

5.

Find generalized class

Gen-Spec diagrams

relationships

6.

Find association between

Whole-part and other

classes

association

7.

Organize the object model

Package diagram

into packages

8.

Model System behavior-II

State diagrams

•Model state changes

Activity diagrams

•Depict work flows

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