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 About arc42

About arc42
arc42, the Template for documentation of software and system architecture.
By Dr. Gernot Starke, Dr. Peter Hruschka and contributors.
Template Revision: 7.0 EN (based on asciidoc), January 2017

© We acknowledge that this document uses material from the arc 42 architecture template, Created by Dr. Peter Hruschka & Dr. Gernot Starke.

This is the index page for the Software Architecture Documentation with the english version of the arc42 standard as a template.

This version of the template contains some help and explanations. It is used for familiarization with arc42 and the understanding of the concepts.

The easiest way for browsing this space is to turn on the sidebar of confluence. You will find the button for it on the lefthand side at the bottom corner of your browser, portrayed as two arrows. Click on it - and the sidebar will show up.

The sidebar works like any browser tree structure. It shows all the 12 chapters of the ARC42 Template. Click on the arrow to see the subchapters or hide them again.

Content Overview

1. Introduction and Goals
Short description of the requirements, driving forces, extract (or abstract) of requirements. Top three (max five) quality goals for the architecture which have highest priority for the major stakeholders. A table of important stakeholders with their expectation regarding architecture.

2. Architecture Constraints
Anything that constrains teams in design and implementation decisions or decision about related processes. Can sometimes go beyond individual systems and are valid for whole organizations and companies.

3. Context and scope
Delimits your system from its (external) communication partners (neighboring systems and users). Specifies the external interfaces. Shown from a business/domain perspective (always) or a technical perspective (optional).

4. Solution Strategy
Summary of the fundamental decisions and solution strategies that shape the architecture. Can include technology, top-level decomposition, approaches to achieve top quality goals and relevant organizational decisions.

5. Building Block View
Static decomposition of the system, abstractions of source-code, shown as hierarchy of white boxes (containing black boxes), up to the appropriate level of detail.

6. Runtime View
Behavior of building blocks as scenarios, covering important use cases or features, interactions at critical external interfaces, operation and administration plus error and exception behavior.

7. Deployment View
Technical infrastructure with environments, computers, processors, topologies. Mapping of (software) building blocks to infrastructure elements.

8. Crosscutting Concepts Overall, principal regulations and solution approaches relevant in multiple parts (→ cross-cutting) of the system. Concepts are often related to multiple building blocks. Include different topics like domain models, architectur patterns and -styles, rules for using specific technology and inmplementation rules.

9. Architecture Decisions
Important, expensive, critical, large scale or risky architecture decisions including rationals.

10. Quality Requirements
Quality requirements as scenarios, with quality tree to provide high-level overview. The most important quality goals should have been described in section 1.2. (quality goals).

11. Risks and Technical Debt
Known technical risks or technical debt. What potential problems exist within or around the system? What does the development team feel miserable about?

12. Glossary
Important domain and technical terms that stakeholders use when discussing he system. Also: translation reference if you work in a multi-language environment.

Created with arc42-blueprint

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