Entity related concepts · 3.3.1
Entity of interest
The entity that architecting and engineering work examines, creates, changes or otherwise influences. It can be an enterprise, a business component, a capability area, a mission area, a mission, a system, a system of systems, a family of systems, infrastructure, a product, a service, a product line, hardware, a software application or a technology.
What this term settles
The term forces a boundary. Without an entity of interest, every architecture conversation drifts between the enterprise, the system and the application, and no description can be complete because no one knows what it is a description of. It also makes clear that the entity is not the same as the model or the document that represents it.
What to do in your practice
Give every architecture engagement a named entity of interest, written as a noun with a boundary sentence. Record what is inside, what is outside and who agreed the boundary. When the conversation moves to another entity, start a second record rather than stretching the first.
Who it binds
The role that owns the practice area the term governs. A definition binds nobody on its own; it binds the reader who adopts the term in a method, a description or a contract.
Evidence an auditor or regulator asks for
- An entity register with one row per entity, a boundary sentence and an owner.An auditor asks what the architecture is an architecture of, and who agreed the boundary.
- The boundary diagram with external entities named.Shows the scope was decided rather than assumed.
- The approval of the boundary by the accountable role.Prevents a team from redefining scope after the fact.
- A note of entities considered and excluded.Shows the boundary was tested, not copied.
Common gaps this page catches
- Teams name a programme rather than an entity, so the boundary moves with the funding.
- The entity is defined by the system that happens to exist rather than by the undertaking.
- No one records what was excluded, so the scope is renegotiated at every review.
What to prepare before publication
For the next architecture engagement, write the entity row before the first workshop. Have the accountable owner sign the boundary sentence. Keep the row in the register and reuse it in the description header.
Common questions
- What does Entity of interest mean in ISO 42024?
- The entity that architecting and engineering work examines, creates, changes or otherwise influences. It can be an enterprise, a business component, a capability area, a mission area, a mission, a system, a system of systems, a family of systems, infrastructure, a product, a service, a product line, hardware, a software application or a technology.
- What evidence should we keep for 3.3.1?
- An entity register with one row per entity, a boundary sentence and an owner. The boundary diagram with external entities named. The approval of the boundary by the accountable role.
Related units
Source. ISO/IEC/IEEE DIS 42024, Clause 3.3.1, Terms and definitions. 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: definition. The definition is in the public preview. This page states it in our own words and does not reproduce the text.
Last updated: 2026-10-21 · Markdown version · Check your practice