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Information technology and information systems in business
3.3 Types of information system
As outlined in Chapter 2, there are three levels of management – strategic, tactical
and operational.
Each level creates different types of strategy within the organisation and therefore
needs different types of information, as outlined by the following chart:
TIME LEVEL OF DEGREE OF
HORIZON DETAIL SOURCE CERTAINTY FREQUENCY
STRATEGIC LONG- AGGREGATED/ MAINLY UNCERTAIN INFREQUENT
TERM SUMMARISED EXTERNAL
TACTICAL
OPERATIONAL IMMEDIATE HIGHLY INTERNAL CERTAIN FREQUENT
DETAILED
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