You collect the explanations of the business necessary for conceptual data modeling from like interviewing, questionnaires, and JAD sessions. Information-gathering methods.
On larger systems development teams, a subset of the project team concentrates on data modeling while other team members focus attention on process or logic mod- efing. You develop (or use from prior systems development) a conceptual data model for the current system and build a conceptual data model that supports the swpe and requirements for the proposed or enhanced system. The work of all team members is coordinated and shared through the project die- flonary or repository. A common CASE tool often maintains this repository, but some organizations still use manual documentation. Whether automated or manual, it is essential that the process, logic, and data model dwiptions of a system be consistent and complete since each describes different but complementary views of the same information system. For example, the names of data stores on the primitive-level DFDs often correspond to the names of data entities in entity-relationship diagrams, and the data elements associated with data flows on DFD's must be accounted for by attributes of entities and relationships in the E-R Diagram.
SSADM (Structured Systems Analysis and Design Methodology).
SSADM (Structured Systems Analysis and Design Methodology) is a methodology (Def. a system of ways of doing things especially regular and orderly procedures), used in the analysis and design stages of systems development. SSADM does not cover SITP issues or the construction, testing and implementation of software.
SSADM has been used by the government in computing since its launch in 1981. It was commissioned by the CCTA (Central Computing and Telecommunications Agency) in a bid to standardise the many and varied IT projects being developed across government departments. The CCTA investigated a number of approaches before accepting a tender from Learmonth & Burchett Management Systems to develop a method.