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Cap Gemini SDM : ウィキペディア英語版 | Cap Gemini SDM
Cap Gemini SDM, or SDM2 (System Development Methodology) is a software development method developed by the software company PANDATA in the Netherlands in 1970. The method is a waterfall model divided in seven phases that have a clear start and end. Each phase delivers (sub)products, called milestones. It was used extensively in the Netherlands for ICT projects in the 1980s and 1990s. PANDATA was purchased by the Capgemini group in the 1980s, and the last version of SDM to be published in English was SDM2 (6th edition) in 1991 by CAP GEMINI PUBLISHING BV. The method was regularly taught and distributed among Capgemini consultants and customers, until the waterfall method slowly went out of fashion in the wake of more iterative extreme programming methods such as Rapid application development, Rational Unified Process (RUP) and Agile software development. ==The Cap Gemini SDM Methodology ==
In the early to mid-1970s, the various generic work steps of system development methodologies were replaced with work steps based on various structured analysis or structured design techniques. SDM, SDM2, SDM/70 and Spectrum more notably evolved into system development methodologies that were based on the works of Steven Ward, Tom Demarco, Larry Constantine, Ken Orr, Ed Yourdon, Michael A. Jackson and others as well as data modeling techniques developed by Thomas Bachmann and Peter Chen. SDM is a top-down model. Starting from the system as a whole, its description becomes more detailed as the design progresses. The method was marketed as a proprietary method that all company developers were required to use to ensure quality in customer projects. This method shows several similarities with the proprietary methods of CAP Gemini's most important competitors in 1990. A similar waterfall method that was later used against the company itself in court proceedings in 2002 was CMG:Commander.〔(Dutch article ) in Computable magazine how the competitor CMG's own method CMG:Commander method was used to prove company responsibility for employee work〕
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