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

logical vs physical models

data dictionary report

physical model how the system requirement are implemented

sequence of model

four model approach