NPS ARCHIVE 1997, Qb LARIMER, L. NAVAL POSTGRADUATE SCHOOL Monterey, California THESIS BUILDING AN OBJECTMODEL OF A LEGACY SIMULATION by Larry R. Larimer • June 1997 Thesis Advisor: Arnold H. Buss Approved forpublic release; distribution isunlimited. COL 'AL POSTGF -'TEREY C . REPORT DOCUMENTATION PAGE Form Approved OMB No. 0704-0188 Publicreportingburdenforthiscollectionofinformationisestimatedtoaverage1hourperresponse,includingthetimeforreviewinginstructions,searchingexistingdatasources, gatheringandmaintainingthedataneeded,andcompletingandreviewingthecollectionofinformation. Sendcommentsregardingthisburdenestimateoranyotheraspectofthis collectionofinformation,includingsuggestionsforreducingthisburdentoWashingtonHeadquartersServices,DirectorateforInformationOperationsandReports,1215Jefferson DavisHighway.Suite1204,Arlington,VA 22202-4302,andtotheOfficeofManagementandBudget,PaperworkReductionProtect(0704-0188),Washington,DC 20503 1. AGENCY USEONLY (Leave Blank) 2. REPORTDATE 3. REPORTTYPEAND DATESCOVERED June 1997 Master's Thesis 4. TITLEAND SUBTITLE 5. FUNDING NUMBERS BUILDING AN OBJECT MODEL OFA LEGACY SIMULATION 6. AUTHOR(S) Larimer, Larry R. 7. PERFORMINGORGANIZATION NAME(S)ANDADDRESS(ES) PERFORMING ORGANIZATION Naval Postgraduate School REPORTNUMBER Monterey, CA 93943-5000 9. SPONSORING/MONITORINGAGENCY NAME(S)ANDADDRESS(ES) 10. SPONSORING/MONITORING AGENCY REPORT NUMBER U.S. Army TRADOC AnalysisCenter Monterey, CA 93943 11. SUPPLEMENTARY NOTES The views expressed in this thesis are those ofthe authorand do notreflectthe official policy orposition ofthe Department of Defense orthe U.S. Government. 12a. DISTRIBUTION/AVAILABILITYSTATEMENT 12b. DISTRIBUTIONCODE Approved for public release, distribution is unlimited 13. ABSTRACT(Maximum200words) The Department ofDefenseproclamation that all simulationscomply with High Level Architecture (HLA) standards prompted the U.S. Army Training and Doctrine Command (TRADOC) Analysis Center (TRAC) to investigate the feasibility of includingJanus in future HLAFederations. Janus, one oftheArmy's mostextensively used models, is an stochastic high- resolution simulation. As a procedural legacy model coded priortotheriseofobject-oriented programming, there are considerablechallenges for Janus to meetHLA requirements. This thesis proposes a methodology toproduce aHLA Simulation ObjectModel (SOM) for procedurally implemented legacy simulations. Theresult obtained by using this methodology is ageneral object model and one or more SOMs. The general object model provides a full object-oriented template ofthe legacy simulation that is unrestricted by the model's code or the minimum requirement forinteroperability. The SOM isderived from thegeneral objectmodel. This research indicates that procedural legacy simulations can comply with the HLA SOM requirement. In orderto achieve this compliance, it is advantageous to firstdevelop the general object model. Additionally, it is importantto include an SOM analyst in the development process iffederation outputs will be used foranalysis. SOM development facilitated the identification ofadditional steps necessary to makeJanus HLA compliant. Thiseffort will continue with areview ofthe SOM by Januscodeexperts and workon asoftware servicethat will allowJanus to communicate with other simulations in the HLA specified format. 14. SUBJECTTERMS 15. NUMBEROFPAGES High Level Architecture, Object Model Template, Simulation Object Model, Federation Object 135 Model, Distributed Interactive Simulation, distributed simulation, object modeling 16. PRICECODE 17. SECURITY 18. SECURITY 19. SECURITYCLASSIFICATION 20. LIMITATION OF CLASSIFICATION CLASSIFICATION OFABSTRACT ABSTRACT OFREPORT OFTHISPAGE Unclassified Unclassified Unclassified UL NSN 7540-01-280-5500 Standard Form298 (Rev. 2-89) PrescribedbyANSIStd.239-18 298-102 Approved for public release; distribution is unlimited. BUILDING AN OBJECT MODEL OF A LEGACY SIMULATION Larry R. Larimer Captain, United States Army B.S., United States Military Academy, 1986 Submitted in partial fulfillment ofthe requirements for the degree of MASTER OF SCIENCE IN OPERATIONS RESEARCH from the NAVAL POSTGRADUATE SCHOOL June 1997 DUDLEYKNOXLIBRARY OOL .1 ABSTRACT The Department ofDefense proclamation that all simulations comply with High Level Architecture (HLA) standards prompted the U.S. Army Training and Doctrine Command (TRADOC) Analysis Center (TRAC) to investigate the feasibility ofincluding Janus in future HLA Federations. Janus, one ofthe Army's most extensively used models, is an stochastic high-resolution simulation. As a procedural legacy model coded prior to the rise ofobject-oriented programming, there are considerable challenges for HLA Janus to meet requirements. This thesis proposes a methodology to produce a HLA Simulation Object Model (SOM) for procedurally implemented legacy simulations. The result obtained by using this methodology is a general object model and one or more SOMs. The general object model provides a full object-oriented template ofthe legacy simulation that is unrestricted by the model's code or the minimum requirement for interoperability. The SOM is derived from the general object model. This research indicates that procedural legacy simulations can comply with the HLA SOM requirement. In order to achieve this compliance, it is advantageous to first develop the general object model. Additionally, it is important to include an analyst in SOM the development process iffederation outputs will be used for analysis. SOM development facilitated the identification ofadditional steps necessary to make Janus HLA compliant. This effort will continue with a review ofthe SOM by Janus code experts and work on a software service that will allow Janus to communicate HLA with other simulations in the specified format. VI THESIS DISCLAIMER The reader is cautioned that computer programs developed in this research may not have been exercised for all cases ofinterest. While every effort has been made, within the time available, to ensure that the programs are free ofcomputational and logic errors, they cannot be considered validated. Any application ofthese programs without additional verification is at the risk ofthe user. Vll Vlll