Model-Driven Evolution of Software Architectures - Software and ...
Model-Driven Evolution of Software Architectures - Software and ...
Model-Driven Evolution of Software Architectures - Software and ...
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Chapter7<br />
<strong>Model</strong>-driven Migration <strong>of</strong> Supervisory<br />
Machine Control <strong>Architectures</strong> 1<br />
Supervisorymachinecontrolisthehigh-levelcontrolinadvancedmanufacturingmachinesthatisresponsibleforthecoordination<strong>of</strong>manufacturingactivities.Traditionally,thedesign<strong>of</strong>suchcontrolsystemsisbasedon<br />
finitestatemachines. Analternative,moreflexibleapproachisbasedon<br />
task-resourcemodels. Thischapterdescribesanapproachforthemigration<strong>of</strong>supervisorymachinecontrolarchitecturestowardsthisalternativeapproach.Weproposeagenericmigrationapproachbasedonmodeltransformationsthatincludesnormalisation<strong>of</strong>legacyarchitecturesbeforetheir<br />
actualtransformation.Tothisend,weidentifyanumber<strong>of</strong>keyconcernsfor<br />
supervisorymachinecontrol<strong>and</strong>acorrespondingnormaliseddesignidiom.<br />
Assuch,ourmigrationapproachconstitutesaseries<strong>of</strong>modeltransformations,forwhichwedefinetransformationrules.Weillustratetheapplicability<strong>of</strong>thismodel-drivenapproachbymigrating(part<strong>of</strong>)thesupervisorycontrolarchitecture<strong>of</strong>anadvancedmanufacturingmachine:awaferscanner<br />
developedbyASML.Thismigration,towardsaproduct-linearchitecture,<br />
includesachangeinarchitecturalparadigmfromfinitestatemachinesto<br />
task-resourcesystems.<br />
7.1 Introduction<br />
Ass<strong>of</strong>twareintensivesystemsevolvetheytendtobecomeincreasinglycomplex[Lehman<strong>and</strong>Belady,1985].Furthermore,thearchitecturedocumentation<strong>and</strong>itscorrespondingimplementationtendt<strong>of</strong>ollowasynchronous<br />
1 Thischapterwaspublishedearlieras:Graaf,Bas,SvenWeber,<strong>and</strong>ArievanDeursen.<br />
<strong>Model</strong>-drivenmigration<strong>of</strong>supervisorymachinecontrolarchitectures.Journal<strong>of</strong>Systems<br />
<strong>and</strong>S<strong>of</strong>tware,2007.Doi:10.1016/j.jss.2007.06.007<br />
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