Explain structured analysis with its different tools
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The structured analysis method helps the analyst decide what type of information to obtain at different points in analysis, and it helps organize information so that the analyst is not overwhelmed by the complexity of the problem.
It is a top-down refinement approach, which was originally called structured analysis and specification and was proposed for producing the specifications. However, we will limit our attention to the analysis aspect of the approach. Before we describe the approach, let us describe the data flow diagram and data dictionary on which the technique relies heavily.
Data Flow Diagrams and Data Dictionary
Data flow diagrams (also called data flow graphs) are commonly used during problem analysis. Data flow diagrams (DFDs) are quite general and are not limited to problem analysis for software engineering discipline. DFDs are very useful in understanding a system and can be effectively used during analysis.
A DFD shows the flow of data through a system. It views a system as a function that transforms the inputs into desired outputs. Any complex system will not perform this transformation in a “single step”, and data will typically undergo a series of transformations before it becomes the output.
It is a top-down refinement approach, which was originally called structured analysis and specification and was proposed for producing the specifications. However, we will limit our attention to the analysis aspect of the approach. Before we describe the approach, let us describe the data flow diagram and data dictionary on which the technique relies heavily.
Data Flow Diagrams and Data Dictionary
Data flow diagrams (also called data flow graphs) are commonly used during problem analysis. Data flow diagrams (DFDs) are quite general and are not limited to problem analysis for software engineering discipline. DFDs are very useful in understanding a system and can be effectively used during analysis.
A DFD shows the flow of data through a system. It views a system as a function that transforms the inputs into desired outputs. Any complex system will not perform this transformation in a “single step”, and data will typically undergo a series of transformations before it becomes the output.
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