Structured analysis and design technique

The SADT method not only allows one to define user needs for IT developments, which is often used in the industrial Information Systems, but also to explain and present an activity's manufacturing processes and procedures.

[3] SADT was developed and field-tested during the period of 1969 to 1973 by Douglas T. Ross and SofTech, Inc.[1][4] The methodology was used in the MIT Automatic Programming Tool (APT) project.

It received extensive use starting in 1973 by the US Air Force Integrated Computer Aided Manufacturing program.

According to Levitt (2000) SADT is "part of a series of structured methods, that represent a collection of analysis, design, and programming techniques that were developed in response to the problems facing the software world from the 1960s to the 1980s.

The SADT's representation is the following: The semantics of arrows for activities:[2] The semantics of arrows for data:[2] According to Mylopoulos (2004) in the software development process multiple roles can or should be distinguished:[2] SADT is used as diagrammatic notation in conceptual design of software engineering and systems engineering to sketch applications,[2] for more detailed structured analysis, for requirements definition,[8] and structured design.