Why software architects fail. And what to do about it

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Why Software Architects Fail 10 Diseases You Should Know About Stefan Tilkov, INNOQ @stilkov

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@stilkov n. A pathological condition of a part, organ, or system of an organism resulting from various causes, such as infection, genetic defect, or environmental stress, and characterized by an identiﬁable group of signs or symptoms. n. A condition or tendency, as of society, regarded as abnormal and harmful. n. Obsolete Lack of ease; trouble. dis ease (dĭ-zēzˈ) ·

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@stilkov 1. Over-Generalization Drive

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@stilkov Symptom: Seeing commonalities in everything and turning them into generic solutions

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@stilkov Phases in a Developer’s Life

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@stilkov 1. The Enthusiastic Developer “This stuff is cool - let’s build programs! For real people!”

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@stilkov Boring, boring, boring. Create Customer Find Customer List Customers Edit Customer Delete Customer Create Order Find Order List Orders Edit Order Delete Order Create Product Find Product List Products Edit Product Delete Product

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@stilkov 2. The Disillusioned Developer “Oh. Real people have boring problems.”

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@stilkov Create Customer Find Customer List Customers Edit Customer Delete Customer Create Order Find Order List Orders Edit Order Delete Order Create Product Find Product List Products Edit Product Delete Product

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@stilkov Create Thing Find Thing List Thing Edit Thing Delete Thing

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@stilkov 3. The Enthusiastic Architect “Generic solutions! Cool!” Create Thing Find Thing List Thing Edit Thing Delete Thing

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@stilkov 4. The Disillusioned Architect KISS YAGNI Lean Minimable viable product Story focus

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‘ ‘ @stilkov When you go too far up, abstraction-wise, you run out of oxygen. Sometimes smart thinkers just don't know when to stop, and they create these absurd, all- encompassing, high-level pictures of the universe that are all good and fine, but don't actually mean anything at all. These are the people I call Architecture Astronauts. Joel Spolsky “Don’t Let Architecture Astronauts Scare you”, http://www.joelonsoftware.com/articles/fog0000000018.html

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@stilkov 5. The “Wise” Architect Answer: It depends. Question: *

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@stilkov 2. Domain Allergy

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@stilkov Symptom: Treating the domain as a negligible nuisance

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@stilkov Application (100%) Configuration 10% The   Generic  Thing  Machine 90%

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@stilkov 80% 20% Functionality: 320% 80% Time/Effort:

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@stilkov Configuration The   Generic  Thing  Machine Customer Developer

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@stilkov The benefits of choices already made Microsoft .NET + Visual Studio SAP et. al. Ruby on Rails

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@stilkov 3. Obsessive Specialization Disorder

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@stilkov Symptom: Believing every problem to be unique, even if it’s been solved 1,000 times

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@stilkov Task: Read a file of text, determine the n most frequently used words, and print out a sorted list of those words along with their frequencies.

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@stilkov Donald Knuth Doug McIlroy Dr. Drang, http://www.leancrew.com/all-this/2011/12/more-shell-less-egg/ 10-page literal Pascal program, including innovative new data structure tr -cs A-Za-z '\n' | tr A-Z a-z | sort | uniq -c | sort -rn | sed ${1}q

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@stilkov 4. Unhealthy Complexity Attraction

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@stilkov Symptom: Being so smart you can’t be bothered by simple approaches

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@stilkov Benefits of Complexity > Challenging work > New and interesting experience > Self-esteem > Community > Barrier to entry > Job security

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@stilkov 5. Analysis Paralysis

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@stilkov Symptom: Taking longer to evaluate than to actually do it

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@stilkov Vendor Selection Collect and agree on requirements Week 0 Conduct market research Week 8 Send out RFP to selected vendors Week 10 Evaluate responses, create shortlist, start PoC Week 14 Evaluate PoC results, recommend vendor X Week 20 Accept your CEO picked vendor Y Week 26

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@stilkov 6. Innovation Addiction

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@stilkov Symptom: Things become progressively less fun the closer you get to production

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@stilkov Symptom: Using fashionable technology because it’s popular  (a.k.a. conference-driven architecture)

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‘ ‘ @stilkov Mindful choice of technology gives engineering minds real freedom: the freedom to contemplate bigger questions. Technology for its own sake is snake oil. Dan McKinley  http://mcfunley.com/choose-boring-technology

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@stilkov Image Credit: Dan Dickinson, https://flic.kr/p/9mUs73

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@stilkov 7. Severe Tunneling Fixation

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‘ ‘ @stilkov I know what I like And I like what I know … Genesis

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@stilkov Symptom: Enforcing an architectural approach that clashes with the framework, libraries or tools you use.

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@stilkov 8. Asset Addiction

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@stilkov Symptom: Becoming so attached to a particular tool/library/framework it becomes a fit for every problem.

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@stilkov 9. Exaggerated Risk Aversion

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@stilkov Symptom: Sticking with horrible, horrible, HORRIBLE tools because they’re there

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@stilkov Symptom: Confusing “easy” with simple, creating accidental complexity

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@stilkov simple complex easy hard Rich Hickey, “Simple Made Easy”, http://www.infoq.com/presentations/Simple-Made-Easy

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@stilkov 10. Impact Dissonance

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@stilkov Symptom: Becoming too detached from the actual system that is being delivered

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@stilkov Related: Governance Megalomania

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@stilkov Symptom: Believing everything has to be approved by you to ensure it meets architecture standards

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@stilkov What architects want to do Shape strategy 30 % Make important decisions 30 % Mentor developers 20 % Explore technologies 20 %

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@stilkov What others think architects do Slow down development 20 % Pick the wrong tools 20 % Refuse to learn from devs 20 % Define annoying rules 40 %

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@stilkov What architects actually do Do technical stuff 5 % Act as salespeople 30 % Try to be involved 35 % Defend architecture 30 %

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@stilkov Image Credit: Sean Michael Ragan, http://flic.kr/p/8XEm6L

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@stilkov I don’t have an answer …

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@stilkov … so here’s one, anyway

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@stilkov An Architect’s Success Formula Dogma and rules 10 % Experience 20 % Pragmatism 20 % Flexibility 10 % Minimalism 10 % Trends and future needs 10 % Experiments & PoCs 10 % Hands-on participation 10 % Vendor advice 0 %

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www.innoq.com innoQ Deutschland GmbH Krischerstr. 100 40789 Monheim am Rhein Germany +49 2173 3366-0 Ohlauer Str. 43 10999 Berlin Germany +49 2173 3366-0 Ludwigstr. 180E 63067 Offenbach Germany +49 2173 3366-0 Kreuzstr. 16 80331 München Germany +49 2173 3366-0 innoQ Schweiz GmbH Gewerbestr. 11 CH-6330 Cham Switzerland +41 41 743 0116 That’s all I have.  Thank you! Stefan Tilkov stefan.tilkov@innoq.com @stilkov +49 170 471 2625

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