1. SISAI 2012 – Statistics Sweden
IT-Architecture principles
Jakob Engdahl ( )
Head of Architecture and Strategy unit – IT Department
Statistic Sweden

2. Background
Going from survey oriented systems to process oriented systems
Transition will take many years
Many systems relies on IT to run parts of the production
Systems lack built-in capability to manage some processes
Used to create custom-built software for administrative processes
Now we use the principle of “buy before build”

3. Principles, Strategies, Guidelines..
Multiple documents is needed to govern the development
Different documents focus on different interrogatives
What, When, Who, Why…
IT-Architecture principles focus on HOW IT-systems should be developed

4. Architecture principles and IT
Describes how changes in the business should be done
IT-Strategy
Describes how the IT-Department should work
IT-Architecture principles
Describes how changes in IT-systems should be done
IT-Handbook
Describes on a practicle level, how developers should work with frameworks, tools etc

5. Principles of IT-architecture principles
IT-Architecture principles should:
Describe HOW
Exclude unwanted ways of creating a system
Be technology agnostic
Different IT-architecture principles have different scope

6. Different types of IT-systems
Supporting administrative processes
Supporting production processes
Survey oriented systems
Process oriented systems
One-time production

7. Scope of principles Principle 1 Principle 2 Principle 3 …
Supporting administrative processes
Principle 1
Principle 2
Principle 3 …
Survey oriented systems
Process oriented systems
One-time production

8. Inherit from SOA Principles
Standardized Service Contract
Service Loose Coupling
Service Abstraction
Service Reusability
Service Autonomy
Service Statelessness
Service Discoverability
Service Composability

9. Conclusions and continued work
IT-Architecture principles could be used to ensure that new systems are created in a maintainable way
Statistics Sweden will continue the work with establishing IT-Architecture principles
Sharing IT-Architecture principles could be helpful in international collaboration and doesn’t require a specific technology

10. Thank you for your attention