CT015-3.5-2 Design Methods

Object Oriented Life Cycle

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Module objectives

After completing this module, you will be able to: Explain Object-Oriented Life Cycle Understand Analysis and Design, Construction,

Testing and Maintenance phases

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Outline

The Life Cycle The Object-Oriented Analysis Phase The Object-Oriented Design Phase The Construction Phase The Object-Oriented Testing Phase The Maintenance Phase

CT015-3.5-2 Design Methods Object Oriented Life Cycle

The Life Cycle

The OODLC is an update of the older SDLC

CT015-3.5-2 Design Methods Object Oriented Life Cycle

The Life CyclePhase

Analysis

Design

Construction

Testing

Maintenance

Activity

OOA

OOD

OOP

O-O Testing

All of the above

ModelsProduced

RequirementsModel

Design versions ofthe OO models

Actual system

Working system

All of the above

Components

Project scope

Feasibility study

Context diagram

Class diagram:

Entity classes

Interface classes

Control classes

Behavior diagrams:

Statechart diagrams

Collaborations and CRC cards

Sequence diagrams

Activity diagrams

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Object Oriented Analysis Phase

model the users requirements

what the final system must PERFORM. Output: Conceptual Model. Consisting of 2 deliverables:

Requirements Model Object Model

CT015-3.5-2 Design Methods Object Oriented Life Cycle

OOA: Requirement Model

The Requirements model has 5 components:1. Project Scope2. Context Diagram 3. Use Case Model 4. Interface Descriptions 5. Feasibility study

CT015-3.5-2 Design Methods Object Oriented Life Cycle

OOA: Requirement Model

Project Scope is a statement of what our project is to produce.

States in general terms what the system will do for the users.

Also say what the system will not do

CT015-3.5-2 Design Methods Object Oriented Life Cycle

OOA: Requirement Model

Context diagram defines the boundarybetween the system, or part of a system, and its environment, showing the entitiesthat interact with it.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

OOA: Use Case Model

It is a case of the usage of the system.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

OOA: Interface Description

GUI Other I.S. Systems Real-World systems that we control Communications interfaces etc.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

OOA: Feasibility Study

Can we do this project? Should we? Can we make it work? Is the cost worth it? etc.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Object Oriented Design Phase

Modify Analysis model to reflect design decisions by mostly adding information to the existing model.

plan of how the system will do what the Requirements Analysis asks for.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Object Oriented Design Phase

Analysis is what the system must do,

Design is how the system will do it.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Construction Phase

Coding and testing. Should be done with an O-O language or

database.

Deployment and user training.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Object Oriented Testing Phase

Complete the unit testing of individual classes and programs

Then system testing. Testing must be thorough and

complete.

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Maintenance Phase

Bug fixes Enhancements Viruses End-user computing Backups and restores Disaster preparedness and recovery

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Review

Object-Oriented Life Cycle Analysis and Design, Construction,

Testing and Maintenance phases

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Further information

COMET: A UML-Based Software Design Method for Single Systems

http://www.informit.com/articles/article.aspx?p=349038&seqNum=7

CT015-3.5-2 Design Methods Object Oriented Life Cycle

Q & A