In a nutshell an enterprise architecture is a collection of facts about the organisation’s current architecture, a development methodology supported by a collection of artefacts and a model of the organisation’s future architecture. On top of that there are the capabilities of the people, processes and technologies that make up the organisation that defines what it is and what it does. An evidence based approach to enterprise architecture requires evidence in a variety of types and to varying degrees of detail to support all of the above.
The current architecture is primarily a collection of facts that have been built up, depending upon how recently the organisation has adopted enterprise architecture, under varying amounts of decision making and control. Information can and should exist about how the current architecture is operating and performing and to what level of satisfaction and success. This information can be formulated to represent existing evidence and therefore provide support for future decisions about change.
The future model of the organisation is a set of concepts that offers a new view of the organisation depending upon the scenarios it envisages. The model and concepts will evolve and impact on that evolution. The degree of possible change will depend upon how far in the future the model is set, the maturity of the strategies and organisational decisions. there will also be unexpected impacts on the organisation and on the strategic direction. This future model is dependent upon an architectural development method to deliver the new version of the organisation as well as the capabilities and tools to support it. So it is important that the evidence ontology is able to support the following principles:
- The evidence ontology needs to be able to support the internal content behind new views and scenarios as well as incorporate evidence from external sources.
- The evidence ontology needs to be able to bring together a variety of research to strengthen hypotheses and recommendations in the artefacts and methods used in the architecture development method.
- Finally the evidence ontology needs to be able to support the formation of an evidence knowledge base that is flexible to help the engineering of future organisation models.