Component Based Software Engineering

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Presentation transcript:

Component Based Software Engineering

Outline Component Based Software Engineering (CBSE) Overview Advantages/Disadvantages of CBSE CBSE vs. Traditional Software Engineering (SE)

What is a Component? “A software component is a software element that conforms to a component model, and can be independently deployed and composed without modification according to a composition standard.” [1],[2]

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

CBSE Definition Developing new software from pre-built components. Attempt to make an association between SE and other engineering disciplines.

Advantages of CBSE Management of Complexity Reduce Development Time Increased Productivity Improved Quality [3]

Disadvantages of CBSE Development of Components Lack of Components Component Maintenance Costs Reliability and Sensitivity to changes Unsatisfied Requirements Trust [3]

More on Trust Components come in several forms Binary Source Code Need a Certification Standard Tests Environments

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.

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 Release Replace Maintenance

CBSE vs. Traditional SE-cont..

CBSE vs. Traditional SE-cont.. CBSE does not have any standard development models like UML for SE. CBSE is young, therefore long term maintainability is largely unknown. [4]

CBSE vs. Traditional SE-cont.. SE can fulfill requirements more easily. CBSE fulfillment of requirements is based on the available components.

Consequences of CBSE Promote Large Scale Reuse Reduce Cost

Summary Young discipline CBSE involves developing a system from pre-built software components It has Advantages and Disadvantages.