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DATA FLOW DIAGRAMS
In this module we will learn
WHY DFD ?
Provides an overview of-
Graphical nature makes it a good communication tool between-
Structure of DFD allows starting from a broad overview and expand it to a hierarchy of detailed diagrams
DFDs models the system by depicting
SYMBOLS USED IN DFD
RULES OF DATA FLOW
An alternate notation is often used
A Data store
LOGICAL DFD FOR CHEQUE ENCASHMENT