{{Short 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 written descriptionrepresentation of a [[software]]product,design that ais softwareto designerbe writesused infor orderrecording todesign giveinformation, aaddressing [[softwarevarious development]]design teamconcerns, overalland communicating that guidanceinformation to the architecturedesign’s ofstakeholders. the<ref>{{Cite softwarejournal|title=IEEE projectStandard for Information Technology--Systems Design--Software Design Descriptions|url=http://ieeexplore.ieee.org/document/5167255/|doi=10.1109/ieeestd.2009.5167255}}</ref> 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.
