Chapter 3 (AIS SUM).docx - Chapter 3 Systems Documentation...
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Chapter 3:Systems Documentation TechniquesDocumentation:explain how the system works, such as who, when, what, why, data entry, processing data, data storage, control of systems, the output of system.Documentation tools:Flow chart, DFD, and business process program.DFD (Data flow diagram):diagram that depict the data source, data process, data storage, data flow and data destinations.DFD consists of, data flow, data source/ destination (Entity), data processing, data storage, and control (internal).Context diagram:the highest level of DFD, which shows the data system view where the source or destination (Input), the processing data and the output.Note:Context diagram doesn’t show the data storage.Context diagram, require at least one input, process and output. The processing data can’t go to another processing entity.Flow chart: Technique that describe how the system works in a concise way by represent everything in symbols. It explains in an aspect as who, what, when and how (logical and physical test).