Criticism
Critics of ICDs and systems engineering in general often complain of the over-emphasis on documentation. ICDs are often present on document-driven projects, but may be useful on agile projects as well (although not explicitly named as such). An ICD need not be a textual document. It may be an (evolving) table of goes-intos and comes-out-ofs, a dynamic database representing each subsystem as a DB view, a set of interaction diagrams, etc.
ICDs are often used where subsystems are developed asynchronously in time, since they provide a structured way to communicate information about subsystems interfaces between different subsystem design teams.
Read more about this topic: Interface Control Document
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