Information systems could be used to perform decision making or to supply the decision maker with adequate information to make a sound decision. Transaction processing systems, could be used to aid structured decisions e.g. a point of sale system could generate an exception report when stock levels are low thus alarming the stores manager to reorder stock. Decision support systems could be used to perform semi-structured decisions e.g. fraud detection or unstructured decisions e.g. corporate planning and forecasting while Executive information systems could be used to unstructured decision making e.g. processing an insurance claim.
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