COMPUTERIZED SYSTEM Essay

Systems techniques are tools used in the analysis, design, and documentation of system and subsystem affinitys. They are more often than not graphical (pictorial) in nature.Systems techniques are used by accountants who do systems work. accompaniment includes the following types of toolsNarratives (written descriptions)FlowchartsDiagramsOther written materialFor this subject, we only need to cover two (2) of the most common documentation tools Data flow diagrams lifelike descriptions of the sources and destinations of selective information. They show Where selective information comes fromHow it flowsThe processes performed on itWhere it goesInclude three typesDocument flowcharts observe the flow of documents and information between departments or units. System flowcharts describe the relationship between inputs, processing, and outputs for a system. Program flowcharts describe the sequence of logical trading operations performed in a computer program DATA FLOW DIAGRAMS A data fl ow diagram (DFD) graphically describes the flow of data deep down an organization. It is used to Document existing systemsPlan and design new systems in that respect is no black-and-white approach to developing a DFD.Data sources and destinations shape up as squaresRepresent organizations or individuals that send or receive data used or produced by the system An item can be both a source and a destinationData flows emerge as arrowsRepresent the flow of data between sources and destinations, processes, and data stores As you probably surmised(GUESS) from the previous slides, if a data flow is two-way, use a bi-directional arrow.If two data elements flow together, then the use of one data flow line is appropriate.