Abstract
Reference models to federate enterprise architectures across multiple agencies are investigated as a means to provide greater mission effectiveness and increased efficiencies. While heuristic and qualitative approaches to federating enterprise architectures have led to the increased use of reference models, their actual effectiveness and value have not been quantified. Federal departments and agencies are under increasing pressure to provide effective government and citizen services with improved efficiency. Enterprise architectures are used to align agencies’ strategic goals and business objectives to resources. As agencies collaborate with each other to achieve better strategic performance and resource savings, the ability to share information about their enterprise architectures is critical to their success. The expected effectiveness of reference models in federating enterprise architectures was quantified employing the classical method of expert judgment. A structured discussion instrument to evaluate reference models was developed and piloted using well-established guidelines for expert judgment. The resulting instrument was used in structured discussions with architects and engineers who are members of an architecture working group across multiple federal government agencies. Reference models were determined to be effective for federating enterprise architectures where participating agencies align their component architectures to the common taxonomy provided by the reference models.
ABOUT THE AUTHORS
Jeff Wilson is a doctoral candidate in Systems Engineering at the George Washington University within the School of Engineering and Applied Science. He received an MS in Electrical Engineering from the Air Force Institute of Technology and a BS in Electrical Engineering from the US Air Force Academy. This article is based on his dissertation research.
Dr. Thomas Mazzuchi is a professor of Engineering Management and Operations Research at the George Washington University. Dr. Mazzuchi holds a DSc from the George Washington University as well. His research interests include reliability and risk analysis, Bayesian inference, quality control, stochastic models of operations research, and time series analysis.
Dr. Shahram Sarkani joined the faculty of the School of Engineering and Applied Science of the George Washington University in 1986 after earning his PhD from Rice University. Since 2001, he has served as faculty advisor for Off-Campus Programs in the Department of Engineering Management and Systems Engineering.
REFERENCES
Bernard S.A.: An Introduction to Enterprise Architecture, Second Edition, Author House, Bloomington, IN (2005).
Cooke R.M.: Experts in Uncertainty: Opinion and Subjective Probability in Science, Oxford University Press, New York (1991).
Cooke R.M., Goossens L.J.H.: Procedures Guide for Structured Expert Judgment, Nuclear Science and Technology, Delft University of Technology: Delft, Netherlands (1999).
DoD: Global Information Grid (GIG) Architecture Federation Strategy, Arlington: US Department of Defense (2007).
Fischer R., Aier S., Winter R.: A Federated Approach to Enterprise Architecture Model Maintenance (2007); refer to: ben.iwi.unisg.ch/fileadmin/if/downloads/Artikel/2007/ Fischer.Aier.Winter.EA-Maintenance.2007.pdf.
Gehris R.: A Simulation Study of the Classical Method of Expert Judgment Combination: How Many Seeds and How Many Experts?, DSc Dissertation, The George Washington University (2008).
GAO: Information Technology: Leadership Remains Key to Agencies Making Progress on Enterprise Architecture Efforts, US General Accounting Office (2003).
GAO: Information Technology: The Federal Enterprise Architecture and Agencies’ Enterprise Architectures are Still Maturing, US General Accounting Office (2004).
Jain R., Chandrasekaran A., Elias G., Cloutier R.: Exploring the Impact of Systems Architecture and Systems Requirements on Systems Integration Complexity, IEEE Systems Journal, Vol. 2, No. 2, pp209-223 (2008).
Lamis J.: The 2008 A&G Reader Survey: The Rise of Strategic IT Planning and Executive Involvement, Architecture & Governance (2008); refer to: www.architectureandgovernance.com/articles.
Lankhorst, M.M. (Ed): Enterprise Architecture at Work: Modelling, Communication, and Analysis, Springer, Berlin (2005).
Maier M.W., Rechtin E.: The Art of Systems Architecting, Third Edition, CRC Press, Taylor & Francis Group, Boca Raton (2009).
Mazzuchi T.A., Linzey W.G., Bruning A.: A Paired Comparison Experiment for Gathering Expert Judgment for an Aircraft
Wiring Risk Assessment, Reliability Engineering & System Safety, Vol. 93, No. 5, pp722-731 (2008).
Morganwalp J.M., Sage A.P.: Enterprise Architecture Measures of Effectiveness, International Journal of Technology Policy and Management, Vol. 4, No. 1, pp81-94 (2004).
Morganwalp J.M.: A System of Systems-Focused Enterprise Architectural Framework, PhD Dissertation, George Mason University (2002).
OMB: FEA Consolidated Reference Model (CRM) Version 2.3, US Office of Management and Budget (2007a).
OMB: FEA Practice Guidance, US Office of Management and Budget (2007b).
OMB: The FY 2008 Performance Report of the Federal Government, US Office of Management and Budget (2009).
Rechtin E.: Systems Architecting of Organizations: Why Eagles Can’t Swim, CRC Press, Boca Raton (2000).
Ross J.W., Weill P., Robertson D.C.: Enterprise Architecture as Strategy: Creating a Foundation for Business Execution, Harvard Business School Press, Boston (2006).
Ryan J.C.H., Mazzuchi T.A., Ryan D.J., Lopez de la Cruz J., Cooke R.: Quantifying Information Security Risks using Expert Judgment Elicitation, Accepted, Article in Press, Computers & Operations Research (2011).
Winter R., Fischer R., Essential Layers, Artifacts, and Dependencies of Enterprise Architecture, Enterprise Distributed Object Computing Conference Workshops, EDOCW ’06, 10th IEEE International (2006).
Wu R., Lin F., Yuan S., Liang K.: A Reference Model and Integration Framework for Building Enterprise Computing Platform, International Journal of Technology Management, Vol. 38, No. 4, pp439-462 (2007).
Zachman J.A.: A Framework for Information Systems Architecture, IBM Systems Journal, Vol. 26, No. 3, pp276-292 (1987).
Zimmermann H.: OSI Reference Model – The ISO Model of Architecture for Open Systems Interconnection, IEEE Transactions on Communications, Vol. 28, No. 4, pp425-432 (1980).
Journal of Enterprise Architecture