Software design description
written design description of a software product
A software design description (a.k.a. software design document or SDD; just design document; also Software Design Specification) is a representation of a software design that is to be used for recording design information, addressing various design concerns, and communicating that information to the design’s stakeholders. An SDD usually accompanies an architecture diagram with pointers to detailed feature specifications of smaller pieces of the design. Practically, the description is required to coordinate a large team under a single vision, needs to be a stable reference, and outline all parts of the software and how they will work.
Composition
The SDD usually contains the following information:
The Data-driven design describes structures that reside within the software. Attributes and relationships between data objects dictate the choice of data structures.
The architecture design uses information flowing characteristics, and maps them into the program structure. The transformation mapping method is applied to exhibit distinct boundaries between incoming and outgoing data. The data flow diagrams allocate control input, processing and output along three separate modules.
The interface design describes internal and external program interfaces, as well as the design of the human interface.
The public source identifies “Software design description” as written design description of a software product. This brief keeps that definition visible, then builds a research path around Software, design and description.
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Stable identifiers, scientific names and standards terminology offer the best bridge between this overview and specialist evidence. The source revision retrieved here is dated Aug 27, 2025. The linked authority identifier is Q2297624. None of the 0 selected statements returned an explicit reference.
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This entry incorporates text from “Software design description” 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.