EA as a method for change
9 important questions on EA as a method for change
What are examples of external drivers for using EA?
How to choose the right 'to-be' architecture?
The picture approach implements the Analytical hierarchy Planning to decide on the right 'to-be architecture'. This approach calculates the best choice by indicating certain weight factors to system characteristics and performing a sensitivity analysis.
It helps in the decision support for information management. It does this by using a Comparison Matrix.
What are two other PWC tools to reduce EA complexity?
- Mapping applications (systems) to business processes (PWC): This model supports analysis of the application portfolio to support management decisions. This leads to a project portfolio. In the end chaging the application portfolio.
- IS Application Portfolio Management: this method tries to map systems to processes what results in the binding of applications to certain processes. As a result redundant applications easily become visible what leads to reduced complexity.
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How can complexity of IS Application Portfolio be reduced?
- Reduce Objective complexity (components, interfaces, functions)
- Reduce #compnents per system & portfolio
- Reduce #interfaces between systems
- Reduce #functions
- Reduce Subjective Complexity
- Reduce the effort to understand the portfolio
- Support decision making using AHP, distinguishing criteria, weights and objectives.
What are various other internal drivers for enterprise architecture implementation?
- Auditing
- Specify Managmenet information
- Manage IT system portfolio
- Manage (out)sourcing relationships
- Guide systems development
- Preparing a Merger or Axquisition
- Reducing complexity
Name the four different types of commandments:
- Enterprise priorities
- Strategic systems per domain
- Domain roadmap
- Business objectives driven
What does the ANSI/IEEE say about Design Principles?
What do expert opinions say about EA Principles?
What do Haki and Legner say about EA Princples?
They state that good princples, based on their guidelines, which can be measured, which fit the architecture, then the quality of EA will increase, which results in EA benefits.
Moreover, it suggests investigating the use of princples and the detailed mechanisms to turn princples into Enterprise Architecture capabilities and benefits.
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