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VerifyingtheOn-LineHelpSystemofSIEMENSMagneticResonanceTomographsCarstenSinzWolfgangKüchlinWSIforComputerScienceSymbolicComputationGroupandSteinbeisTechnologyTransferCenterOITUniversityofTübingen,GermanyMotivationMRtomographsarecomplexproductswith

manyequipmentoptionsHowtomanagecomplexity(configurations,handbooks)?Howtoavoiddocumentationerrors?Complexdocumentation,favorablyconfiguredindividuallyforeachproduct

ConfigurableProductsModular,lotsofvariations;adaptationtocustomer’sneeds(e.g.PCs,cars,software,telecommunicationequipment,…)DependenciesandrestrictionsbetweencomponentsConfigurationhasbeenanareaofAIresearchformanydecades

[e.g.DEC’sR1/XCONSysteminthe80s]MagneticResonanceImagingMedicalimagingtechniqueReliesonspinsofatomicnucleiFirst,MRappliesstrongmagneticfieldstoalignspinsintissueThen,imposedRFpulsesdisturbspinsandenforceprecessionofnucleiCoilswrappedaroundpatientmeasurerelaxationresultsMagneticfieldgradientsappliedtodetermine3DpositionSIEMENSMRTomographs:

FiguresandCharacteristics11basicMRsystems(modellines):Concerto,Symphony,Harmony,…Totalof47configurablecomponenttypes,e.g.:14differentgradientpoweramplifiers82differentcoils(forexaminationofdifferentpartsofthebody)9differentgradientcoils20service-softwareadd-ons2railwaymainsfrequencyEFIs45destinationcountries(e.g.India,CzechRepublic,…)…SIEMENSMRTomographs:

ConfigurationConstraints4receiversrequire2receiverboards

(RecNumOf4requiresRXNumOf2)RadiofrequencypoweramplifierK2137/K2204requirestransmittertype2 (RFPA_K2137_K2204requiresTRA2)GradientpoweramplifierK2209_400VrequiresgradientcoilAS39SorAS39SR (GPA_K2209_400Vreq.GradCoil_AS39SorGradCoil_AS39SR)Alargecabinrequiresbodytunebox024L (CabinType_LargerequiresBTB_024L)Rx4=X-2SIEMENSMRTomographs:

ProductStructureTypeSystemMPCUReceiverRx4SatelliteMainHarmonyConcertoTableSAR300MHzR-4X-2OpenHWX-1IECR-2TypeNodeItemNodeConstraintRx4=X-2SIEMENSMRTomographs:

ProductStructureTypeSystemMPCUReceiverRx4SatelliteMainHarmonyConcertoTableSAR300MHzR-4X-2OpenHWX-1IECR-2TypeNodeItemNodeConstraintSelectedProductInstance:

Type=Main

System=Harmony

MPCU=300MHz

Receiver=R-4

Rx4=X-2<Structure> <TypeIDREF="INT_ConsoleType"MinOccurs="1"MaxOccurs="1"> <ItemIDREF="INI_ConsoleType_Sat"/> <ItemIDREF="INI_ConsoleType_Main"> <SubTypeIDREF="INT_System"MinOccurs="1"MaxOccurs="1"> <!--Harmony--> <ItemIDREF="INI_System024"> <SubTypeIDREF="INT_Comp_MPCU"Default="INI_Comp_MPCU300"MinOccurs="1"MaxOccurs="1"> <ItemIDREF="INI_Comp_MPCU300"/> </SubType> ... <SubTypeIDREF="INT_Comp_ReceiverNumOf"MinOccurs="1"MaxOccurs="1"> <ItemIDREF="INI_Comp_ReceiverNumOf2"/> <ItemIDREF="INI_Comp_ReceiverNumOf4"> <Conditions> <ConditionType="INT_Comp_RXNumOf"Op="eq" Value="INI_Comp_RXNumOf2"/> </Conditions> </Item> </SubType> </Item> ... </SubType> </Item> </Type></Structure>RX4=RX4-2SystemMPCURcvr.RX4LiegeSARHarm.Conc.MainTypeSatell.300M.R-4RX4-2MHWOpenIECRX4-1R-2ProductStructureinXMLProductManualsComplexproducts

complexmanualsGoal:User/servicemanualsreflectproductinstanceathandIndividuallyconfiguredmanualMaintenanceprocedures(e.g.calibration)optimizedforeachproductinstanceSolution:Modularhelpsystem(HelpPackages)EachhelppackagecoversonlyalimitedaspectEachhelppackagemaybeconfiguration/workflowdependentAutomaticselectionofappropriatepackagestobuildacomplete,individualdocumentationforeachproductHelppackagecontent(e.g.HTML)HelppackagesDependency(matchingconf.,encodedinXML)xy<html>...</html>ModularHelpSystemConsistencyofHelpSystemForeachadmissible(valid)productinstance:Nomissinghelppackages?Nooverlaps(twoormorehelppackagesforsameconfiguration)?

Transformtopropositionallogicsatisfiability(SAT)problem!TransformationtoSATConsistencyofon-linehelpsystemcorrespondstovalidityof:TransformationDetail:

ValidConfigurationsRecursivedefinitionofvalidityValidityconditionsforbothTYPEandITEMnodes;e.g.forTYPEnodes:TransformationtoSAT:Example1[ValConfT(Type),SubItemsValid.Satellite]23(INI_ConsoleType_Sat=>4(~INT_System&~INT_Comp_MPCU&~INT_Comp_RXNumOf&5~INT_Comp_ReceiverNumOf&~INT_Comp_COT&~INT_Comp_SAR)6)&78[ValConfT(Type),SubItemsValid.Main]910(INI_ConsoleType_Main=>11(INI_System024[Harmony]=>12INI_Comp_MPCU300&~INI_Comp_MPCU133&~INI_Comp_MPCU266&13=1:(INI_Comp_RXNumOf1,INI_Comp_RXNumOf2)&14(INI_Comp_ReceiverNumOf4=>INI_Comp_RXNumOf2)&15=1:(INI_Comp_ReceiverNumOf2,INI_Comp_ReceiverNumOf4)&16~INT_Comp_COT&17~INT_Comp_SAR18)&19(INI_System007[Concerto]=>... ...25)&26=1:(INI_System024,INI_System007)27)&28=1:(INI_ConsoleType_Sat,INI_ConsoleType_Main)&2930[TypeDefinitions]3132(INI_ConsoleType_Sat|INI_ConsoleType_Main=>INT_ConsoleType)&...Systematicsof

ConsistencyChecksProductStructureInXMLHelpPackageAssignmentInXMLPropositionalEncodingofProd.Struct.PropositionalEncodingofAssignmentResultofConsistencyCheck(Overlaps/Holes)SATSolver/BDDPackageExperimentalResultsPropositionalencodingofproductstructureresultsin:1425propositionalvariables11018clauses(CNFSATencoding)9715formulanodes(BDD)Run-timeforcompletecheck:6.96s(on1.2GHzAthlonwith512MBMemory)11modellines,964helpcontexts,12helppackagesTechnicalRealizationMRproductstructurestoredinXMLdatabaseSGMLhelppageswithattacheddependencies(prop.logicformulae)HelpCheckerimplementedinC++ReadsXMLproductstructurePerformschecks(BDD/SATco

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