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Data Flow Diagram

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Puneet Arora
Puneet Arora

How to make Data Flow Diagrams

EducaçãoEconomia e finançasNegócios
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How to : Data Flow Diagrams (DFDs)
Data Flow Diagrams (DFDs) ,[object Object]
DFD Symbols (Gane & Sarson) Process Data Flow Data Store Source/Sink (External Entity)
Process ,[object Object],[object Object],[object Object]
Rule 1: Process ,[object Object]
Rule 2: Process ,[object Object]
Process: Correct/Incorrect?
Data Flow ,[object Object],[object Object],[object Object]
Data Flow: Correct/Incorrect?
Data Store ,[object Object],[object Object]
Rule: Data Store ,[object Object]
Data Store: Correct/Incorrect?
Source/Sink (External Entity) ,[object Object],[object Object],[object Object],[object Object],[object Object]
Rule: Source/Sink ,[object Object]
Source/Sink: Correct/Incorrect?
Rules for Using DFD Symbols ,[object Object],YES NO A process to another process A process to an external entity A process to a data store An external entity to another external entity An external entity to a data store A data store to another data store
List the errors of this DFD
Context Diagram ,[object Object],[object Object],[object Object]
Context Diagram of Order System
Level-0 DFD ,[object Object],[object Object]
Context Diagram of Order System
Level-0 DFD of Order System
Lower-Level Diagrams ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object]
Strategies for Developing DFDs ,[object Object],[object Object],[object Object],[object Object]
[object Object],[object Object],[object Object],[object Object]
Identify Entities,Process,Data Stores & Data Flow ,[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],[object Object],1.0 2.0 3.0 4.0 5.0
Context Diagram of Order System
Level-0 of Order System

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Data Flow Diagram