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CHAPTER 5 (data and process modelling) (data dictionary/ repository…
CHAPTER 5 (data and process modelling)
overview of data and process modelling tools
use DFD to describe the IS
DFD
how to draw, must refer slide
data dictionary/ repository
storehouse of information about the system data
analyst use it to collect, document and organizing specific facts about the system
contain meaningful combination of related data element
documenting the data element
documenting the data flow
documenting the data stores
documenting the process
documenting the entities
documenting the record
data dictionary report
logical vs physical models
physical model how the system requirement are implemented
sequence of model
four model approach