[[Image:6 Decomposition Structure.svg|thumb|240px|right|Top down decomposition structure.]][[Image:Sadt.png|thumb|240px|right|An SADT example.]]
=== Top down approach ===
The structured analysis and desigdesign technique uses a decomposition with the [[Top-down and bottom-up design|top-down approach]]. This decomposition is conducted only in the physical ___domain from an axiomatic design viewpoint. Because of this nonzigzagging process, there is no guarantee of functionality or productivity. Therefore, those methods faded away as the requirements for software systems increased and the object-oriented method was introduced.<ref> Nam Pyo Suh (2007). [http://www.axiomaticdesign.com/technology/ADSChapter5.html ''Axiomatic Design - Advances and Applications'']. New York : Oxford University Press Chapter 5, pp. 239-298.</ref>
