Rainer Bartsch, Senior Enterprise Architect at RWE/Innogy give insights into Application Harmonization at EA Connect Days 2018 in Bonn: The Energy Trading business has been changing from high to low margins, from long running contracts to highly volatile (intraday) markets, from a few big players to many smaller market participants and to a business model that requires us to approach new markets and opportunities around the globe. Such constant business change, over time, results in a quite diverse IT landscape using all kinds of technologies and a hell of a lot of people to keep it running. This obviously is adverse business change but what can I do to harmonise my IT environment or prevent to get into such a situation? For sure, it doesn’t happen by accident or just by having a bunch of good developers, a set of architecture guidelines and tools! Bartsch demonstrated RWE's approach to application harmonisation based on a business & IT commitment to deliver IT solutions against a set of 10 Design Principles. This includes LeanIX as our application inventory and two different examples on how to cover Design Principles, first as Custom Tags and second as Custom Fact Sheets.

1. Application
Harmonisation
using Design
Principles in LeanIX
Rainer Bartsch,
RWE Supply & Trading GmbH
EA Connect Days,
Bonn, 22./23. November 2018

2. Our heart – Europe‘s largest Energy Trading Floor

3. Question: in the context of your company’s IT function,
which of the following do you think is true?
A) We don’t have a collective view of what ‘good looks like’
B) There are too many conflicting viewpoints and too many parochial
concerns in the IT organisation
C) There is little discipline within the IT organisation – so we need to
think more ‘architecturally’
D) We have a real mix of competencies within the IT organisation, and
some people shout louder than others

4. Answer: I think they are all true!
This is effectively the challenge! So if we want good IT, we …
• need to know what ‘good looks like’ – before we can start any
kind of harmonisation measures
• must transcend our parochial (i.e. narrow, local) perspectives
• have to be disciplined
skilled
people
A man with a hammer …
- a database admin tries to solve
problems with database capabilities
unskilled
people
Dunning-Kruger effect …
- often too unskilled to know it and
suffer from illusory superiority
Questions:
how do we know
what “good
looks like” ?

5. The Architect’s answer is: Design Principles
Business
value first
We are using Design Principles to define
what “good looks like”, because:
• provide guideline with clear direction
• express the value of our organization
• help to inform our decisions

6. The Architect’s answer is: Design Principles
Business
value first

7. Two different ways to implement Design Principles
A) Use LeanIX Application Tagging
B) Create new LeanIX Fact Sheet type – custom extension

8. A) – Setup
1 2
3

9. A) – Application Assessment
1
2
3

10. A) – Assessment Report
• Application Landscape
report
• Structured based on
Business Capabilities
• VIEW: select certain
Design Principle Rating

11. B) – Setup
1 2

12. B) – Application Assessment
Add
1
2
3

13. B) – Assessment Report
• Standard Application
Landscape report still
can be used
• New dedicated
Design Principles Rating
report available
• Clustering per Design
Principle
• VIEW: Design Principle
Rating

14. Approach to take decisions for application harmonisation
#DP TI EOI
1 1,0 -
2 0,5 0,5
3 0,5 0,5
5 1 -
10 1 -
Avg. 0,8 0,5
Business Value
Based on Business
Continuity Rating
10m EUR
Invest
MigrateEliminate
Tolerate
Business Value
TechnicalIntegrity
Low
Low High
High
ATD2
0,8
10m
Priority
Action
Consider
Avoid
(Eliminate)
Business Value
EaseofImplementation
Low High
Low
Easy
0,5
10m
move+/-
ATD2
ATD2

15. What else is important to consider?
A) Add further values to the relation / assessment
- “Ease of Implementation” (effort to remove Technical Debt)
B) Review Completeness & Consistency
- have all Design Principles been applied to each application?
C) Hierarchy
- model parent / child relationships to detail DPs further
- P/C: too complex to model → capture details at relation
D) Implement TIME and PACE reports in LeanIX
E) Any other idea?

16. Rainer Bartsch
RWE Supply & Trading GmbH
Enterprise Architecture
Altenessener Strasse 27, D-45141 Essen
Tel.: +49 201 5179 2113
Mobile: +49 162 2514405
E-Mail: rainer.bartsch@rwe.com