Requirements Analysis

Requirements Modeling

• Requirements analysis through requirements models
• Requirements prioritization
• Requirements selection
• RE uses requirements models to understand the requirements well.
• Requirements modelling can dguide elicitation, provide a measure of progress, help to uncover problems, help us check out understanding

 

Structured Analysis

• A set of techniques and graphical tools : allowing the analysts to develop a new kind of system specification that are easily understandable to the users.
• Data/Functional modeling : DFD, ERD
• State-oriented modeling : STD
• Analysts attempts to divide large, complex problems into smaller, more easily handled ones.

 

Data Flow Diagram(DFD)

• Provides a means for functional decomposition