Volume 7

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Evaluating the Effectiveness of Reference Models in Federating Enterprise Architectures

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.

EA Heavy and EA Light: Two Examples of Successful Enterprise Architecture

Often literature reports on unsuccessful attempts at enterprise architecture. Many exercises do not progress beyond their initial stages, losing momentum during their execution, or they run to conclusion without delivering the promised benefits. This article reports on a significant experience by the authors—engaged as consultants to two Australian-based multinational companies—during the execution of two very different, successful enterprise architecture projects that managed to deliver and demonstrate tangible benefits to the respective organizations. Although both projects included important IT technical components, their success was based on enterprise architecture teams that clearly understood the business objectives, linked the enterprise architecture activities directly to them, and clearly communicated the benefits in business terms. We argue that to engage and maintain support an enterprise architecture exercise must have a business purpose that is clearly understood by all stakeholders, and it must be carefully tailored to the intended purpose, both in terms of effort and deliverables, and no more. Our discussion includes the strategy, methods, and tools used by the enterprise architecture teams to conduct each engagement, and a discussion of the results and lessons learnt.

The business does not exist! Why Enterprise Architecture is often a mission impossible

Successful application of enterprise architecture is not easy. Many books and articles have been written on the subject. They describe how alignment with ―the business‖ is essential and subsequently delve into architecture frameworks, procedures, organization, governance, and the required skill set. This article will show that in general there is no such thing as ―the business‖ and how this represents the major obstacle for successful enterprise architecture and mature IT.

Streamlining IT Application Selection and Integration with a Standard Modeling Language

IT customers, application providers, and system integrators generally do not use standard representations to describe either application requirements or proposals to satisfy them. The resulting ambiguity exposes application selection and integration processes, however well-structured and executed, to error and delay. Adoption of the ArchiMate® visual modeling language, an Open Group standard, would therefore increase the efficiency and effectiveness of the business application marketplace.