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Component Based Software

Engineering

Presented by

Homer LeMar

March 30th

, 2005

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Outline

Component Based Software

Engineering (CBSE) Overview

Advantages/Disadvantages of CBSE

CBSE vs. Traditional Software

Engineering (SE)

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What is a Component?

A software component is a software

element that conforms to a component

model, and can be independentlydeployed and composed without

modification according to a

composition standard.

[1],[2]

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What is a Component?-cont..

Component Model Interaction Standards

Clearly Defined Interface

Composition Standards Describe how components can be composed into larger structures

Substitutions

Example: COM

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CBSE Definition

Developing new software from pre-

built components.

Attempt to make an association

between SE and other engineering

disciplines.

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Advantages of CBSE

Management of Complexity

Reduce Development Time

Increased Productivity

Improved Quality

[3]

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Disadvantages of CBSE

Development of Components Lack of Components

Component Maintenance Costs Reliability and Sensitivity to changes Unsatisfied Requirements Trust

[3]

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More on Trust

Components come in several forms Binary

Source Code

Need a Certification Standard Tests

Environments

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CBSE vs. Traditional SE

CBSE views the system as a set of

off-the-shelf components integrated

within an appropriate architecture. SE seeks to create a system from

scratch.

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CBSE vs. Traditional SE-cont..

CBSE Life Cycle is

shorter.

CBSE develops

Architecture.

CBSE is less

expensive

[3]

CBSE Waterfall

Find

Select

Requirements

Design

Adapt

Test

Deploy

Implementation

Test

Release

Replace Maintenance

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CBSE vs. Traditional SE-cont..

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CBSE vs. Traditional SE-cont..

CBSE does not have any standard

development models like UML for SE.

CBSE is young, therefore long termmaintainability is largely unknown.

[4]

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CBSE vs. Traditional SE-cont..

SE can fulfill requirements more

easily.

CBSE fulfillment of requirements isbased on the available components.

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Consequences of CBSE

Promote Large Scale Reuse

Reduce Cost

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Summary

Young discipline

CBSE involves developing a system

from pre-built software components

It has Advantages and Disadvantages.

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References

[1] Council, William T. and Heineman, George T., Component-Based

Software Engineering. Addison-Wesley: Upper Saddle River, 2001.

[2] Pour, Gilda, Component-Based Software Development approach: New

Oppurtunities and Challenges, Proceedings of the 26 th International

Conference on Technology of Object-Oriented Languages and Systems,1998.

[3] Crnkovic, Ivica, Component-based Software Engineering New

Challenges in Software Development, in 27th Int. Conf. Information

Technology Interfaces ItI 2003, June 1-19, 2003, Cavtat, Croatia.

[4] Way, Ju An, Towards Component-Based Software Engineering,

Proceedings of the eighth annual consortium on Computing in SmallColleges Rocky Mountain conference, pg. 177-189, Orem, Utah, 2000.