Structured systems analysis and design method: Difference between revisions

Revision as of 06:49, 12 June 2013

Revision as of 11:59, 16 June 2013

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The products of this stage are:

*Users CatalogCatalogue describing all the users of the system and how they interact with it

*Requirements CatalogsCatalogues detailing all the requirements of the new system

*Current Services Description further composed of

*Current environment logical data structure ([[Entity-relationship model|ERD]])

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*Full data dictionary including relationship between data stores and entities

To produce the models, the analyst works through the construction of the models as we have described. However, the first set of data-flow diagrams ([[Data flow diagram|DFDs]]) are the current physical model, that is, with full details of how the old system is implemented. The final version is the current logical model which is essentially the same as the current physical but with all reference to implementation removed together with any redundancies such as repetition of the information that makes up the users and requirements catalogscatalogues.

=== Stage 2 – Business system options ===