Solution architecture align solution with business in a top down and vertical direction. It address the specific requirement but also created stovepipe systems. Enterprise Architecture thinks in vertical, horizontal and circular direction to minimize the redundant investments by incorporate the engineering of reuse and consolidation in cross-cut horizontal direction and achieve the reuse and consolidation via the circular effort of Governance and Compliance. Further more, EA is a three tier approach instead of a big-bang in adapting to change. it recognize the Enterprise is a living thing which change constantly with ticking time,
The 3×3 EA model support the organic enterprise
EA architect the organic enterprise in three theoretical direction of vertical alignment, horizontal SOA and circular coherence solution architecture is basically in vertical direction top down or bottom up. Enterprise is organic which change constantly. IT is futile to EA in a big bang approach. The 3×3 architecture approach suggest to adopt to change in a three tiers approach of Notional EA, Execution-able EA and Daily EA instead of a big bang EA approach The main purpose to solution architecture is to automate business processes, it is business centric, On the other hand, Enterprise Architecture is not business process centric, It model the business capability, concept of operation and activity model but not the detail business process model for automation purpose. EA is an emerging paradigm rather than an enterprise wide solution architecture which only create a larger stovepipe. Solution Architects does not automatically become an enterprise architect by building enterprise wide solution architecture. solution architects are the IT “Guru” to design the automation system in a command and control approach. Enterprise Architects are the “Glue” not the “Guru” to close the gaps between strategy and execution via facilitating collaboration and enable enterprise agility in adopting to change.
This section explain the adaptive EA approach based on the familiar IT practice. However, EA is as a holistic architecture method is not limited in the IT world, the same adaptive EA concept will also be helpful to establish collaborative enterprise culture and to architect the organic business.
THE THREE DIRECTION EA THOUGHTS
THE THREE TIER EA APPROACH IN ADAPTING TO CHANGE
The relation between ITEA , COBIT and ITIL
IT management does not consist of IT architecture but also IT governance and IT service. In the analogy of a living person, IT Governance is the mind, IT Architecture is the body and IT Services is the value. The following IT management cube shows the three side to IT management , IT governance, IT Architecture and IT service is the three side of IT management. Most of The IT community is IT architecture centric with limited knowledge on IT governance and IT service. Most of the IT architect and engineers have get some training on IT governance and IT service such as COBIT (the IT governance framework) and ITIL. (the IT service framework). However, most of they are they are also confused between IT Governance, IT Architecture and IT services particularly between the role of COBIT and ITIL. The next figure further elaborate the relation between IT Governance, IT Architecture and IT services.