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Software Construction Software Construction

Chapter 1Chapter 1

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Software Development ActivitiesSoftware Development Activities Problem DefinitionProblem Definition Requirements DevelopmentRequirements Development Construction PlanningConstruction Planning Software Architecture (high-level design)Software Architecture (high-level design) Detailed DesignDetailed Design Coding and DebuggingCoding and Debugging Unit TestingUnit Testing Integration TestingIntegration Testing System TestingSystem Testing MaintenanceMaintenance

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Software ConstructionSoftware Construction

Coding and Debugging part of software developmentCoding and Debugging part of software development Also involves detailed design, Construction Planning, Also involves detailed design, Construction Planning,

unit testing and integration testingunit testing and integration testing Known also as Coding or ProgrammingKnown also as Coding or Programming Consumes around 65% of small project time and 50% Consumes around 65% of small project time and 50%

of medium size timeof medium size time 50%-75% of project errors50%-75% of project errors Cost less to fix than analysis or design errorsCost less to fix than analysis or design errors

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Specific tasks involved in construction:Specific tasks involved in construction:

Verifying the software Development processVerifying the software Development process Determining how code will be testedDetermining how code will be tested Designing and writing classes and routines Designing and writing classes and routines

(functions)(functions) Creating and naming variables and named Creating and naming variables and named

constantsconstants Selecting control structures and organizing Selecting control structures and organizing

blocks of statementsblocks of statements

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Specific tasks involved in construction: Specific tasks involved in construction: Continue…Continue…

Unit testing, integration testing, and debugging Unit testing, integration testing, and debugging codecode

Reviewing other team members' low-level Reviewing other team members' low-level designs and code and having them review designs and code and having them review yoursyours

Formatting and commenting codeFormatting and commenting code Integrating software components that were Integrating software components that were

created separatelycreated separately Tuning code to make it faster and use fewer Tuning code to make it faster and use fewer

resourcesresources

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Importance of Software ConstructionImportance of Software Construction

Take large part of software development Take large part of software development processprocess

Efficient programming techniques produce Efficient programming techniques produce better quality softwarebetter quality software

Source code describe, represents and Source code describe, represents and documents software, while other artifacts documents software, while other artifacts might be out of datemight be out of date

Construction cannot be dropped.Construction cannot be dropped.