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Software Development ProcessSoftware Development Process
in LVTin LVT
CMMICMMI Action planAction plan

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Presentation goalsPresentation goals
 Present suggested action plan for better developmentPresent suggested action plan for better development
processprocess
 Get feedback from technical staff beforeGet feedback from technical staff before
implementationimplementation

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AgendaAgenda
 Current process findings (general)Current process findings (general)
 Suggested action plan:Suggested action plan:
– GeneralGeneral
– RequirementRequirement
– Analysis and designAnalysis and design
– Verification/validationVerification/validation
 Possible price and success indicatorsPossible price and success indicators

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Current Process finding –Current Process finding –
Summary:Summary:
Most of the needed activities are done, BUT:Most of the needed activities are done, BUT:
 Not all of themNot all of them
 Not in all the groupsNot in all the groups
 Not consistentlyNot consistently
 The design process seems to be the most important.The design process seems to be the most important.

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What’s next ???What’s next ???
 Process enhancements recommendations:Process enhancements recommendations:
– Action plan per development activity (crisp but flexible)Action plan per development activity (crisp but flexible)
– CASE tool support (+ reverse engineering) EA/RRCASE tool support (+ reverse engineering) EA/RR
– Use existing formats (EPS/IPS) with UML enrichmentsUse existing formats (EPS/IPS) with UML enrichments
– Supporting training (UML/UP), consultingSupporting training (UML/UP), consulting
 We need your commitmentWe need your commitment

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Requirements:Requirements:

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Requirements:Requirements:
GOAL: Understand, document and model what theGOAL: Understand, document and model what the
customer really needscustomer really needs
 Use lite-UML (CASE driven) formatUse lite-UML (CASE driven) format for requirements:for requirements:
– Functional requirements:Functional requirements:
 Use case format (Diagrams and description) for main requirementsUse case format (Diagrams and description) for main requirements
– Non-Functional:Non-Functional:
 Usability (UI/GUI, Help)Usability (UI/GUI, Help)
 Reliability (Robustness, recoverability)Reliability (Robustness, recoverability)
 Performance (throughput, response time)Performance (throughput, response time)
 Supportability (scalability, testability, flexibility)Supportability (scalability, testability, flexibility)
– Constraints related:Constraints related:
 Design (legacy code,Design (legacy code,
 Implementation (language, standards, limited resources)Implementation (language, standards, limited resources)
 Physical (HW architecture, Size…)Physical (HW architecture, Size…)
 Interfaces (API’s, protocols, formats…)Interfaces (API’s, protocols, formats…)

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Design:Design:
GOAL: Reflect requirements in system detailedGOAL: Reflect requirements in system detailed
description.description.
 Design phases:Design phases:
– Architecture design:Architecture design:
 Partition the system into manageable tasksPartition the system into manageable tasks
 Definition of system wide strategiesDefinition of system wide strategies
– Logical designLogical design
 Solve all open issues, algorithmsSolve all open issues, algorithms
 Model the user interface (GUI ?)Model the user interface (GUI ?)
 Work on reusability (correct classes)Work on reusability (correct classes)
– Physical DesignPhysical Design
 Reflection of NFRs, constraintsReflection of NFRs, constraints
 Implementation (language, standards, limited resources)Implementation (language, standards, limited resources)
 Modeling all interfaces.Modeling all interfaces.

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ProposedProposed Design process:Design process:
 Design products:Design products:
– Write design document:Write design document:
 Use IPS + UML formatUse IPS + UML format
 Use UML diagrams (sequence diagram, class diagram)Use UML diagrams (sequence diagram, class diagram)
when appropriate.when appropriate.
 Algorithms and forecasted performance analysis whenAlgorithms and forecasted performance analysis when
appropriate.appropriate.
– Run design reviewRun design review for each new product/featurefor each new product/feature
 Discretionary forum.Discretionary forum.

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Proposed Verification process:Proposed Verification process:
GOAL: Verify requirements answered, enhanceGOAL: Verify requirements answered, enhance
product quality.product quality.
 Write a test planWrite a test plan for each new product / large featurefor each new product / large feature
developed:developed:
– FunctionalFunctional
 Cover all use casesCover all use cases
 Unit testing and system testing / full flow testingUnit testing and system testing / full flow testing
– Non-functionalNon-functional
 Robustness, performance…Robustness, performance…
– Regression:Regression:
 Add to regression test baseAdd to regression test base
 Analyze expected results changeAnalyze expected results change
 Review test planReview test plan within group.within group.
 Run code reviewsRun code reviews (1:1s) for risky/complex code segments.(1:1s) for risky/complex code segments.

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Price and indicators:Price and indicators:
 Price we have to pay;Price we have to pay;
– UML courses for most peopleUML courses for most people
– Learning curve (first half year only)Learning curve (first half year only)
 Improvement Indicators:Improvement Indicators:
– Satisfaction/improvement surveySatisfaction/improvement survey
– Better WDCBetter WDC
– Better internal/external bug ratioBetter internal/external bug ratio
– Less effort ? (hard to measure)Less effort ? (hard to measure)

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BackupBackup

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MotivationMotivation

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MotivationMotivation

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Testing MotivationTesting Motivation

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