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Architectural Value in Agile Projects – A Tale of Two Paths

Architectural Value in Agile Projects – A Tale of Two Paths
by

Manuel Pais

on 21 June 2011

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Transcript of Architectural Value in Agile Projects – A Tale of Two Paths

Architectural Value in Agile Projects
A Tale of Two Paths
Agile PT - 21st June 2011
manuelpais@gmail.com
Agilist
Traditionalist
Will never deliver!
Can't
support
security!
Case Study: MsLite Project
MsLite: centralized management of automated building devices (air conditioning, access control, lighting, etc)
functional reqs
quality reqs
codebase
design views
?
Path #2: Maximizing value for the end user
Path #1: Minimizing implementation cost
Preparation
functional reqs
user stories
quality reqs
acceptance test cases
VALUE
Agilist
Traditionalist
Cost
Value
Architectural Elements
Customer Requirements
DSM/
DMM
Propagation
Cost
Propagation Cost = number of architectural elements that will be affected by a change to a single element in the system.
Step 1
Step 4
...
...
Conclusions
50% user value
delivered in step 2
No user value
yet in step 2
Final Release
Minimal
rework
14% more costly
Future
Systematic methods and tools
for identifying alternative paths?

References
http://www.sei.cmu.edu/library/assets/whitepapers/wicsa2011BrownNordOzkaya.pdf
Analysis and Management of Architectural Dependencies in Iterative Release Planning
http://www.crosstalkonline.org/storage/issue-archives/2010/201011/201011-Brown.pdf
Enabling Agility Through Architecture
http://dannorth.net/introducing-bdd/
Introducing BDD
The Design Structure Matrix
http://dsmweb.org/
Thanks!
Nanette Brown
Robert Nord
Ipek Ozkaya
Full transcript