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Table of Contents
- Support & Sponsors
- About the Author
- Acknowledgements
- Color Scheme
- Tooling and Build
- Content Analytics
- Pageviews and Visitor Count
INNOQ supports this site.
INNOQ supports creation and maintenance of this site and the whole arc42 ecosystem. Thanx a lot, this support is highly appreciated.
About me (Gernot)
My name is Gernot Starke. I’m:
- happily married, we have two (grown-up) kids and live in Cologne, Germany.
- Fellow at INNOQ,
- Coaching and consulting medium and large-scale enterprises on topics around software architecture and methodical software engineering.
- Co-founder and maintainer of arc42, the template for pragmatic and systematic software architecture documentation.
- Founder of aim42, the open-source framework for systematic software architecture improvement.
- Active member and working group lead within the International Software Architecture Qualification Board, iSAQB.
- Trainer for the iSAQB curriculum (modules FOUNDATION, IMPROVE, REQ4ARC and ADOC).
- Regular speaker at IT-conferences.
- Author and co-author of more than a dozen books on software architecture, patterns, arc, and the like. Most of these books are written in German. Take a look at Leanpub for some of my English books.
- Author of quite a few articles
Acknowledgements
- Thanx to Michael Mahlberg, Peter Hruschka, Markus Meuten and Daniel Lauxtermann for suggestions, bug fixes and moral support.
- Thanx to Steffen Späthe for his intense reviews and constructive comments concerning the content.
- Thanx to Dr. Alexander Lorz and Dr. Michael Sperber for intense discussion around quality.
- Thanx to Per Starke for his awesome technical support in things around Liquid and Jekyll.
-
Thanx to Remko Plantenga @exde3297, Martin Weck @martinweck, Eberhard Wolff @ewolff, Paul Boeck @PapaBravo, Dean de Bree @ddebree, Markus Stier @mstier, Fabian Angst @angstitc for their contributions.
- Numerous issues and PRs were fixed with support by GPT-5, Claude-Sonnet and Gemini-2.5 Pro. These LLMs know css definitely better than I do.
Find the complete list of contributors here
Color Scheme
This site uses a simple color scheme to distinguish between the main content types.
Text: #003366
Text: #1B5E20
Text: #2C3E50
Text: #003366
These colors are defined in the following css variables:
- qualities:
$brand-color-blue: #00B8F5;preview - requirements:
--reqs-background-color: #92ef80;preview - standards:
--standard-background-color: #ffc95c;preview - articles (and generic pages):
--article-background-color: #e6daf2;preview
Tooling and Build
- This page is based upon Jekyll, a static website generator.
- It uses a modified and modernized version of the Ttskch theme.
- It’s maintained on Github and published via github-pages.
- A Docker container provided by Bret E. Fisher for local build- and test of the site.
-
In case you want to run the site locally, use
docker compose upafter cloning the repo locally. - build_revision: 44783e8eafb6e8d3aec3cbbcaa76b917afc03d38,
- last built and published on Sun Aug 31 15:10:16 2025
Content Analytics
Here we analyze our content, especially the links between content elements. In the long run we aim at having everything well-connected:
- Every quality is associated with at least one (high-level) property (check: Qualities without Tag)
- Every quality has relations to other qualities (check: Orphan Qualities)
- Every quality has at least one specific requirement (check: Qualities without Requirements)
- The list of related qualities (
related:) in the header of every quality file contains only existing qualities (check: No orphan relations for qualties) - Every standard relates to one or multiple qualities (check: No Standard without Qualities)
Qualities without Tag (aka property)
The following 1 qualities have no tag defined:
Orphan Qualities
The following 1 qualities have no directly related qualities defined:
Qualities without Requirements
The following 55 qualities currently have no requirements directly related to them:
Attractiveness, Co-existence, Cohesion, Communicability, Conciseness, Controllability, Credibility, DORA Metrics, Debuggability, Deployability, Devops-Metrics, Discoverability, Durability, Effectiveness, Evolvability, Expected physical environment, Faultlessness, Features, Functional suitability, Functionality, i18n (Internationalization), Immunity, Independence, Installability, Intrusion Prevention, Learnability, Legal Requirements, Longevity, Loose Coupling, Non-repudiation, Observability, Operational constraint, Operational and Environment Requirements, Performance Efficiency, Personalization, Provability, Recovery time, Redundancy, Releasability, Replaceability, Reproducibility, Reusability, Safe integration, Securability, Self-containedness, Self-descriptiveness, Simplicity, Standard Compliance, Test Coverage, Timeliness, Transactionality, Transparency, Upgradeability, User engagement, Versatility,
No orphan relations for qualities
Explanation: Every quality has a field
related:in its header, which contains the names of related qualities. Here we check forrelated:fields containing non-existing entries.
The following 5 orphan relations were found (quality → non-existent related quality):
Discoverability → findability
Discoverability → intuitiveness
Durability → data-integrity
Provability → verifiability
Transactionality → data-integrity
No standard without qualities
Every quality standard (like ISO-5055) shall have at least one or more qualities related to it.
The following 2 standards have no qualities related to them:
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