Three other experts contributing to this rise in DFD methodology were Tom DeMarco, Chris Gane and Trish Sarson. This rigorous documentation approach contrasts with modern agile approaches such as Scrum and Dynamic Systems Development Method (DSDM.) Structured Systems Analysis and Design Method (SSADM), a waterfall method to analyze and design information systems.Object Oriented Analysis and Design (OOAD), put forth by Yourdon and Peter Coad to analyze and design an application or system.It became more popular in business circles, as it was applied to business analysis, than in academic circles.Īlso contributing were two related concepts: The structured design concept took off in the software engineering field, and the DFD method took off with it. They based it on the “data flow graph” computation models by David Martin and Gerald Estrin. Data flow diagrams were popularized in the late 1970s, arising from the book Structured Design, by computing pioneers Ed Yourdon and Larry Constantine.
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