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1、AParadigmforDecentralizedProcessModelinganditsRealizationintheOzEnvironmentIsraelZ.Ben-ShaulGailE.KaiserDepartmentofComputerScienceColumbiaUniversityNewYork,NY10027ToappearinSixteenthInternationalConferencelanguage(PML).Enactioncaninvolvemonitoring,onSoftwareEngineering
2、,May1994.guidance,automation,enforcement,constrainingandcontrollingthework
ow,andsimulatingpartsorallofthesoftwareprocess.Aspeci cinstanceofaPCEisAbstractconstructedbytailoringagenerickernelthatbehavesastheenactionengineforthePML;thisistypicallyWepresentamodelfordecentr
3、alizedProcessCen-carriedoutbyadistinguishedenvironmentadminis-teredEnvironments(PCEs),whichsupportconcertedtrator,andisofnoconcerntotheaverageenvironmente ortsamonggeographically-dispersedteams
4、eachuserwhoparticipatesintheprocess.localteamwithitsownautonomousprocess
5、and
6、em-phasize
exibilityinthetradeo betweencollaborationvs.autonomy.WeconsiderbothdecentralizedprocessWhyDecentralization?modelinganddecentralizedprocessenaction.Wede-scribearealizationintheOzdecentralizedPCE,whichLarge-scaleproductdevelopmenttypicallyrequiresemploysarule-b
7、asedformalism,andalsoinvestigateparticipationofmultiplepeople,oftendividedintotheapplicationtoPCEsbasedonPetri-nets.multiplegroups,eachconcernedwithadi erentfacetoftheproduct.Forexample,onesoftwareproductmayrequireteamsforrequirementselucidation,func-1IntroductionandMot
8、ivationtionalspeci cation,design,coding,testing,documen-tation,andmaintenance;anotherproductmayinvolvemultipleteams,inthiscasewitheachresponsibleforAprocessisapartiallyorderedsetofstepsforde-fulldevelopmentofadistinctcomponentofthesys-velopingasoftwaresystem.Inadditiont
9、ode ningtem.Eachteamusesitsownselectionoftools,andthestepsandtheirinterfacestotoolsinsomeformalpossiblyitsownprivatedataandmanagementpoli-notation,aprocessmodelalsospeci esprerequisitestocies.Atthesametime,theteamsneedtocooperateeachstep,theconsequencesofeachstep,andany
10、syn-inordertodeveloptheproduct,andasstudiesinsoft-chronizationamongconcurrentsteps.Processesarewareengineering
