360I_Barry O’Reilly, software architect and creator of Residuality Theory

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“Residuality Theory is the idea that a random simulation of stress is more efficient than precision and prediction in a complex environment.”


Are you interested in creating antifragile systems? What do you think about the utilisation of residuals? How can we pivot smartness from the marketing to the innovative understanding?


Interview with Barry O’Reilly, software architect. This is a special episode because of Barry’s Residuality Theory which was established for software architecture but I think it can be VERY useful for urban systems as well, though it still needs proof. We will talk about his vision for the future of cities, Residuality Theory, antifragility and resilience, networks, and many more.

Barry O’Reilly is a software architect with over 25 years of experience in the IT industry, having held chief architect roles at global companies like Microsoft, where he also served as worldwide lead for the solutions architecture community. A certified architect with expertise in Azure, service orientation, and IoT, Barry is the founder of Black Tulip Technology and the creator of Residuality Theory, a groundbreaking approach to software architecture that embraces complexity by designing systems inspired by dynamic stressors for greater antifragility and efficiency. Currently pursuing a Ph.D. in complexity science and software engineering at The Open University, he is a regular speaker at global conferences, a community leader, and author of Residues: Time, Change, and Uncertainty in Software Architecture. Barry delivers world-class consulting, coaching, and mentoring, redefining architecture as the management of complexity.

Find out more about Barry through these links:

Connecting episodes you might be interested:


What was the most interesting part for you? What questions did arise for you? Let me know on twitter @WTF4Cities or here in the comment section!

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I hope this was an interesting episode for you and thanks for tuning in.


Episode generated with ⁠⁠Descript⁠⁠ assistance (⁠⁠affiliate link⁠⁠).

Music by Lesfm from Pixabay

4 responses to “360I_Barry O’Reilly, software architect and creator of Residuality Theory”

  1. […] Theory, a fresh approach to designing systems that thrive in complex environments. Then, episode 360I brought an engaging interview with Barry O’Reilly, the theory’s creator, who explored […]

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  2. […] episode 360I of the What is the Future for Cities? podcast, Barry O’Reilly explains how stress fosters […]

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  3. […] is a great preparation to our next interview with Barry O’Reilly in episode 360 talking about how residuality theory can be used for the future of […]

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  4. […] is a great preparation to our next interview with Barry O’Reilly in episode 360 talking about how residuality theory can be used for the future of […]

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