Interface control document
type of document
An interface control document, commonly identified by the acronym ICD, is a technical document used to record, define and control interface information between systems, subsystems, equipment, hardware components or software components.
In systems engineering, an interface can be understood as a shared boundary between functional units, defined by characteristics related to functions, physical exchanges of signals and other technical attributes. The control of such interfaces is relevant in projects in which different parts of a system need to be developed, integrated, tested and maintained in a compatible way.
An ICD is used mainly in contexts where the integration of technical elements requires a precise definition of shared information. This information may include signals, messages, data formats, communication protocols, physical characteristics, compatibility requirements and responsibilities between the parties involved. For this reason, this type of document is associated with integration, verification, validation, configuration management and change control activities in engineering projects.
Description and purpose
An interface control document records, in a controlled manner, the information needed for interconnected elements of a system to remain compatible with each other. It works as a common reference for teams involved in development, integration, verification, validation, maintenance and change control, reducing ambiguities that may arise when separately developed parts of a system need to exchange data, signals or physical information with each other.
The main purpose of an ICD is to establish a shared description of the interface. This description allows different teams to understand how the elements of the system must communicate or connect, which information must be exchanged, which constraints must be respected and which technical parameters must remain compatible.
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The citation trail is more important than the brevity of the summary: it shows where individual claims can be examined in context. The source revision retrieved here is dated Sep 5, 2026. The linked authority identifier is Q1666037. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Interface control document” on English Wikipedia. Contributors are listed in the page history. Text is available under the Creative Commons Attribution-ShareAlike 4.0 License. Selected authority identifiers and statements are retrieved from Wikidata under CC0; their references and qualifiers remain part of the verification path.