Structured systems analysis and design method
Structured Systems Analysis and Design Method (SSADM) is a systems approach to the analysis and design of information systems. SSADM was produced for the Central Computer and Telecommunications Agency, a UK government office concerned with the use of technology in government, from 1980 onwards. SSADM is a waterfall method for the analysis and design of information systems. SSADM can be thought to represent a pinnacle of the rigorous document-led approach to system design, and contrasts with more contemporary agile methods such as DSDM or Scrum. SSADM is one particular implementation and builds on the work of different schools of structured analysis and development methods, such as Peter Checkland's soft systems methodology, Larry Constantine's structured design, Edward Yourdon's Yourdon Structured Method, Michael A. Jackson's Jackson Structured Programming, and Tom DeMarco's structured analysis. The names "Structured Systems Analysis and Design Method" and "SSADM" are registered trademarks of the Office of Government Commerce (OGC), which is an office of the United Kingdom's Treasury. The principal stages of the development of Structured System Analysing And Design Method were: 1980: Central Computer and Telecommunications Agency (CCTA) evaluate analysis and design methods. 1981: Consultants working for Learmonth & Burchett Management Systems, led by John Hall, chosen to develop SSADM v1. 1982: John Hall and Keith Robinson left to found Model Systems Ltd, LBMS later developed LSDM, their proprietary version. 1983: SSADM made mandatory for all new information system developments 1984: Version 2 of SSADM released 1986: Version 3 of SSADM released, adopted by NCC 1988: SSADM Certificate of Proficiency launched, SSADM promoted as ‘open’ standard 1989: Moves towards Euromethod, launch of CASE products certification scheme 1990: Version 4 launched 1993: SSADM V4 Standard and Tools Conformance Scheme 1995: SSADM V4+ announced, V4.2 launched 2000: CCTA renamed SSADM as "Business System Development".