# A.4 Enterprise and system concepts, ISO 42024 ## Published contents Contents1 Scope2 Normative references3 Terms and definitions4 Architecture concepts4.1 Overview4.2 Architecture and architecting4.3 Architecture design and solution design4.4 Architecture definition and communication4.5 Stakeholder concerns and architectural aspects4.6 Architecture viewpoints and architecture views4.7 Architecture frameworks and architecture description languages4.8 Architecture descriptions and architecture models4.9 Reference architectures and reference models4.10 Life cycle and life history4.11 Architecting precepts5 Architecting principles5.1 Introduction to the principles5.2 Principles about the purpose of an architecture5.3 Principles about the focus of an architecture5.4 Principles about architecting outcomesTerms 3.2 Architecting concepts 3.2.1 Architecture3.2.2 Architecture feature3.2.3 Architecting3.2.4 Architecting principle3.2.5 Architecture principle3.2.6 Architecture framework3.2.7 Reference architecture3.3 Entity related concepts 3.3.1 Entity of interest3.3.2 Solution entity3.3.3 Environment3.3.4 Context3.3.5 Enterprise3.3.6 System3.3.7 Aspect3.3.8 Dimension3.4 Architecture design concepts 3.4.1 Design (noun)3.4.2 Architecture design3.4.3 Architecture information package3.4.4 Engineering effort3.4.5 Solution design3.4.6 Solution information package3.4.7 Stakeholder3.4.8 Stakeholder perspective3.4.9 Concern3.5 Architecture description concepts 3.5.1 Architecture description3.5.2 Solution description3.5.3 Architecture view3.5.4 Architecture viewpoint3.5.5 Model3.5.6 Metamodel3.5.7 Reference model3.6 Entity life cycle concepts 3.6.1 Life cycle3.6.2 Life cycle phase3.6.3 Life cycle stage3.6.4 Life historyAnnexes A.1 Architecture design and solution related entitiesA.2 Architecture expressed as a set of modelsA.3 Life cycle and life history conceptsA.4 Enterprise and system conceptsA.5 Duality of architectural decomposition and architectural synthesisB.1 BackgroundB.2 Aligning architecture in designB.3 Duality of architectureB.4 Pursuit of opportunities Home / Annex A Annex A, Notes on terms and concepts · A.4 # Enterprise and system concepts The subclause is the fourth note in Annex A, on enterprise and system concepts. It builds on enterprise (3.3.5) and system (3.3.6), and on the entity of interest (3.3.1) that both can be. - annex section, status not stated in the public preview - Annex section - ISO/IEC/IEEE DIS 42024 - Last updated: 2026-10-21 ## What this unit settles The note addresses the two entities most often confused at the top of an architecture practice. The document uses enterprise for the undertaking and system for the arrangement that produces a stated behaviour. The note is where that distinction is worked through. ## What to do in your practice For each top level architecture, record whether the entity is an enterprise or a system, and state the behaviour or undertaking in a sentence. Where an architecture claims both, split it or state which one leads. Write the enterprise statement and the system statement for the same change and put them side by side. If they describe the same thing, the firm has one entity with two labels, and the top level architecture will keep oscillating between them at every reorganisation. ## Who it binds The architecture practice, as a note. The public preview does not state the annex status, so this page does not claim one. ## Evidence an auditor or regulator asks for - The entity type and statement per top level architecture. An auditor asks what kind of entity the architecture is about. - The behaviour or undertaking sentence. Makes the boundary meaningful. - The split record where both were claimed. Shows the ambiguity was resolved. - The owner. Makes the decision accountable. Ask your teamIs this top level architecture about an undertaking or about a system, and does the document say so? ## Common gaps this page catches - Enterprise architecture is scoped to the organisation and system architecture to applications, with no stated distinction. - An architecture claims both entities. - No behaviour or undertaking statement exists. ## What to prepare before publication Classify the top level architectures by entity type. Add the statement sentence to each. Resolve the dual claims with the accountable owner. ## Common questions What does Enterprise and system concepts mean in ISO 42024? The subclause is the fourth note in Annex A, on enterprise and system concepts. It builds on enterprise (3.3.5) and system (3.3.6), and on the entity of interest (3.3.1) that both can be. What evidence should we keep for A.4? The entity type and statement per top level architecture. The behaviour or undertaking sentence. The split record where both were claimed. ## Related units - 3.3.5 - 3.3.6 - 3.3.1 Source. ISO/IEC/IEEE DIS 42024, Annex A.4, published contents. Open the official record. Retrieved 21 October 2026. https://www.iso.org/obp/ui/en/#iso:std:iso-iec-ieee:42024:dis:ed-1:v1:en ISO catalogue record 87510, the status, stage and page count. Claim level: annex section, status not stated in the public preview. The annex title and subclause title are in the public preview. The body text is not public. Last updated: 2026-10-21 · Markdown version · Check your practice Source: https://iso-42024-revision-checker.theartofservice.com/annex-a/enterprise-and-system-concepts/