Mike's Notes
- A linear increase in functionality and dependency leads to a logarithmic increase in complexity.
- The rise in complexity and risk of failure in big IT projects is a power law.
- Partition and simplify to reduce complexity
- Partitioned chunks of functionality are then suitable for Agile teams
- The maths is sound
- Puts maths behind what Martin Fowler writes
- Not in contradiction with Zachman's ontology
- Complements Google reWork study results
- Training is expensive
Resources
- ObjectWatch (no longer maintained)
- RogerSessions.com
- Simple Architectures (no longer maintained)
References
- Reference
Repository
- Home > Ajabbi Research > Library > Author > Roger Sessions
- Home > Handbook >
Last Updated
11/05/2025
Roger Sessions
Mike is the inventor and architect of Pipi and the founder of Ajabbi.
From the website ..."Roger Sessions is the world's leading expert in IT Complexity Analytics. He has been interviewed by ComputerWorld, CIO, Information Age, and Information Week, among others, and is often quoted by Gartner and other industry pundits. For more than a decade, his books and white papers have defined the field of IT Complexity Analytics. He has been honoured as a Fellow of the International Association of Software Architects for his many contributions to the field. His SIP methodology is the gold standard for Complexity Management, and is the only approach to simplification that has ever been granted a U.S. patent."
Training is available at RogerSessions.com
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