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[[File:SADT.svg|thumb|240px|right|SADT basis element.]]
'''Structured analysis and design technique''' ('''SADT''') is a [[systems engineering]] and [[software engineering methodology]] for describing [[system]]s as a hierarchy of functions. SADT is a [[structured analysis]] modelling language, which uses two types of diagrams: [[activity model]]s and [[data model]]s. It was developed in the late 1960s by [[Douglas T. Ross]], and was formalized and published as [[IDEF0]] in 1981.
==Overview==
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