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ENTERPRISE ARCHITECTURE

FOR CIO DECISION MAKING

PONTUS JOHNSON, PH.D.

MATHIAS EKSTEDT

ROYAL INSTITUTE OF TECHNOLOGYSWEDEN

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ENTERPRISE ARCHITECTUREA MODEL-BASED DISCIPLINE

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ENTERPRISE ARCHITECTUREMODELS AS DECISION SUPPORT

Decision Maker Models

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!

Questionsand

Answers

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MAIN QUESTION:

WHAT SHOULD BE MODELED?

Modeling is expensive Maximize utility of minimal model Make explicit the critical questions and how

to answer them (theory) before defining the models (views), not the other way around

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THE REAL WORLD FOR A GENERAL

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THE REAL WORLD FOR A CIO

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QUESTIONS FOR THE GENERAL

1. Where is the best place for our defense?

2. Where is the best place to hide our troops?

3. What is the best way to attack the enemy?

4. …

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QUESTIONS FOR THE CIO

1. What is the best way to secure our information?

2. Where is the best place to allocate new functionality?

3. What is the best way to improve the flexibility of the enterprise system?

4. …

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THEORY FOR THE GENERALACCORDING TO CARL VON CLAUSEWITZ

1. Where is the best place for our defense?a) Place the defense at any narrow path.b) Use an impassable obstacle to support our flank.

2. Where is the best place to hide our troops?a) Hide behind a mountain, inside a forest, in villages, small thickets,

or rolling terrain. b) Keep troops in columns.

3. What is the best way to attack the enemy?a) Attack enemy wing from the rear.b) Attack enemy wing from the front and from the flank.

4. …

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THEORY FOR THE CIOACCORDING TO LIU ET AL.

1. What is the best way to secure our information?a) Maintain a high-quality security policy

b) Uphold high security awareness

c) Enforce strict access control

d) Implement intrusion detection systems

e) Deploy firewalls

f) …

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A MAP FOR A GENERAL

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A MAP FOR A GENERAL

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A SECURITY VIEW FOR A CIO (a)

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A SECURITY VIEW FOR A CIO (b)

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DECISION SUPPORT FOR A GENERAL

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DECISION SUPPORT FOR A CIO

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SUMMARY

By making explict how EA models answer the important questions we can ensure their usefulness as decision support. For this we need to:

1. Identify the most relevant questions

2. Determine how to answer them (theory)

3. Create models/views in accordance with theory

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Enterprise IT Security According to Liu et al.

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Enterprise IT Security According to Liu et al.

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Enterprise IT Security According to Liu et al.

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Advantages of using Theory Diagrams

You know what to model Theories can be examined Competing theories can be

compared Theories can be reused