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Data Flow Diagram (DFD)
DATA FLOW DIAGRAM Data Flow Diagram (DFD) describes the system distribution into a smaller system. DFD allows the user to easily learn about computer and understand about worked system. DFD allows to learn new system are logically develop without consider the physically environment where the data flow (like by phone, mail, etc) or physically environment where the will be save (like file card, microfiche, hard disk, tape, diskette, etc). DFD is a tool used in methodology structured Analysis and design. CONTEXT DIAGRAM Context Diagram consists of one process to describe the system environment. It’s a highest level in DFD which is describes all the input into the system and output from system. System has a boundary which is to separate the system with the external entity. In context diagram there is no storage. Because context diagram are process to describe the system environment. ZERO DIAGRAMS Zero diagrams are describes the process of DFD. It gives a opi...
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