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Functional Modeling

At the end of this chapter you will be able to know about functional modeling of system. You will also be able to know about the design elements of the system.

Functional Requirements

Design elements
Input(s) and Output(s)
Design of Databases

Functional Modeling Techniques
Data Flow Diagrams
Elements of Data Flow Diagrams - Processes, External Entities, Data Flow, Data Stores

An Example of a DFD for a System That Pays Workers

Conventions used when drawing DFD's

DFD Example - General model of publisher's present ordering system

Data Dictionary

The procedure for producing a data flow diagram


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