Glossary Updates12 new terms added to the glossaries · October 2, 2026, 22:44 CEST
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Glossary · Automation software engineering and architecture

Software component

Also known as: Component (software)

German: Softwarekomponente

In software engineering, a software component is a modular, replaceable unit of software that encapsulates its implementation and interacts with its environment only through defined provided and required interfaces.

  • Software engineering

In one sentence

A software component is a replaceable software unit that hides its implementation and interacts only through defined interfaces.

Example

The alarm management component can be replaced by a newer version without changing the rest of the HMI, because it communicates only through its alarm interface.

How it applies

  • Engineering: Components are units of design, delivery and testing. Their interfaces allow teams to develop them in parallel and test them in isolation with a Component test.
  • Configuration management: Each component has its own version; a system release is a defined combination of component versions.
  • Documentation: Component boundaries help structure design documentation and interface references. For users, components are rarely visible; documentation should describe functions rather than internal components.

Software component vs. software module

A Software module is a unit of source code organization. A software component is a unit of architecture and deployment with explicit interfaces; one component can consist of several modules.

By knowledge.aitechdoc.world · Published September 26, 2026 · Last reviewed

Source: AI TechDoc Knowledge editorial definition, based on component-based software engineering practice

Definitions follow the cited standards and specifications. Where a source is a copyrighted publication, such as an ISO, IEC or EN standard, the definition is a close paraphrase, not a verbatim quotation, so as not to infringe copyright. We recommend reading the original publication. The sections “How it applies” are editorial commentary by AI TechDoc Knowledge and are not part of any standard.

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