Diploma in Business Process Management - | pt-BR - 623 - 44709

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Módulo 4: leitura de dados Diagramas de Fluxo

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• Nota de Estudos
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 Alice B. 0 0 Good summary for a bit complicated topic.
 Maliha H. 0 0 summary Modules 4 data flow diagram (DFD) is a graphical representation of a system, which depicts a systerm's components, data, sources, destinations and storage of data context diagram is a top level of D infomation sysstem which describes data flows into and out of system and inot and out of externanal entities physical data flow diagram is a graphicial system shows internal and external entities of data into and out of entities a lofical data flow diagram is a graphical whish shows system's processess of dta into and out of processes
 Maliha H. 0 0 when two dfd equivalent enternal data call balanced the subdividing called top down partituioning
 Maliha H. 0 0 dfd is systerm's components of data of org context diagram is to-level or least detailed diagram of information system, shows into or out of the system and into and out of external entities Physical data flow diagram of system shows internal and external entities of into and out of entities a logical data flow diagram shows system's processes and the flows of data into and out of the processes logical dfd is more functions on system performs tow dfd equivalent external data flows called balanced, balanced set of dfd is context diagram, a logical dfd and physical dfd are correct subdividing or exploding of logical dfd is called top-down partitioning, when properly performance and leads to a set of balanced dfds
 Dr G C. 0 0 Data Flow Diagrams are critical for the projects .. do you agree ?
 OLUCHI O. 0 0 Is a DFD complete without a top down partitioning?
 Ehimare U. 0 0 why do the diagram have many circle and arrow in term of explaination?
 Hasan R. 0 0 The DFD represents a comprehensive integrated view of the whole information system being modeled. It presents a functional orientation of the information as it moves through the system, from the perspective of the information. Within the DFD, subsystems/functions are called "processes." A DFD shows the relationship of processes to external systems, organizations, users and other processes. In general, DFDs are not to be read as traditional flow charts since they do not show flow of control or timing implications surrounding the process. There can be many entry and exit points to a DFD and the processes within a DFD can be performed on independent time cycles (e.g., daily, monthly, annually) with no necessary sequence of operations from one process to another. Within a DFD, the following symbols may appear: 1.Round corner rectangles 2.Square 3.Open ended rectangles
 Hasan R. 0 0 The DFD represents a comprehensive integrated view of the whole information system being modeled. It presents a functional orientation of the information as it moves through the system, from the perspective of the information. Within the DFD, subsystems/functions are called "processes." A DFD shows the relationship of processes to external systems, organizations, users and other processes
 Hasan R. 0 0 Reading Data Flow Diagrams: Data flow diagrams (DFDs) are categorized as either logical or physical. A logical DFD captures the data flows that are necessary for a system to operate. It describes the processes that are undertaken, the data required and produced by each process, and the stores needed to hold the data. On the other hand, a physical DFD shows how the system is actually implemented, either at the moment (Current Physical DFD), or how the designer intends it to be in the future (Required Physical DFD). Thus, a Physical DFD may be used to describe the set of data items that appear on each piece of paper that move around an office, and the fact that a particular set of pieces of paper are stored together in a filing cabinet. It is quite possible that a Physical DFD will include references to data that are duplicated, or redundant, and that the data stores, if implemented as a set of database tables, would constitute an un-normalised (or de-normalised) relational database. In contrast, a Logical DFD attempts to capture the data flow aspects of a system in a form that has neither redundancy nor duplication

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