REQUIREMENTS ENGINEERING
REQUIREMENTS GATHERING AND ANALYSIS
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Question
[CLICK ON ANY CHOICE TO KNOW THE RIGHT ANSWER]
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Process
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Design
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Analysis
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Requirements
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Detailed explanation-1: -During the Analysis phase of the SDLC, analysts identify processes and data flows in a logicaldata flow diagram (DFD). In the design phase, physical DFDs are created.
Detailed explanation-2: -A data flow diagram (DFD) is a graphical or visual representation using a standardized set of symbols and notations to describe a business’s operations through data movement. They are often elements of a formal methodology such as Structured Systems Analysis and Design Method (SSADM).
Detailed explanation-3: -It can be used to communicate between a system analyst and anyone else involved in developing a system. The DFD is a modelling tool for structured analysis. Data Flow Diagrams are widely used because they facilitate visualising the significant phases and data involved in software-system processes.
Detailed explanation-4: -As described previously, context diagrams (level 0 DFDs) are diagrams where the whole system is represented as a single process. A level 1 DFD notates each of the main sub-processes that together form the complete system. We can think of a level 1 DFD as an “exploded view” of the context diagram.