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documentation is constantly refined as detailed under 1.1 Purpose standing of the requirement increase. The CCT A of the UK government and Siemens For project management purposes the SSADM life Nixdorf (SNI) have undertaken a joint project to com cycle is defined in terms of work packages, modules, pare the CCTA’s methodology SSADM and Siemens stages and steps. Each work package is completed when Nixdorf’s product GRAPES]). SSADM is an analysis a specified set of documentation is produced and satis and design methodology for computer systems. fies specified quality criteria. All activities undertaken at GRAPES is a graphical language used within the each point are those necessary to produce the required framework provided by the DOMINO@: process tech documentation. nology of Siemens Nixdorf for analysis and design of information systems. (In the 1991 Statement of Direc The analysis is undertaken concentrating on three key tion it was declared the Siemens Nixdorf main line for perspectives: modelling technology.) The study was undertaken in February and March 1991. • functions (users’ views of system processing to react to events) The goal of the study was to compare SSADM and • events (real-world business events, e.g. 'receipt of DOMINO/GRAPES to discover whether both application'; or system-generated, e.g. end-of-month approaches elicit the same knowledge about a system.
