A5 DESCRIBING SYSTEMS
This section is concerned with the written comments and graphical illustrations that form the description of a system. The symbols and layout conventions referred to are those given in British Standards BS 4058:1987, BS 7738:1994 and in ISO 19501:2005. Related topics can be found in Section F5 User interface and documentation, Section A4 Systems design and life cycle, Section C1 Programming concepts, Section C5 Describing programs and Section C6 Testing and running programs.
Software systems will require some modification during their lifetime. If this is to be done satisfactorily, it is vital that good, complete and understandable documentation is available. Requests to modify software may arise for a number of reasons, ...
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