Different Type of Information System

11191 Words May 14th, 2011 45 Pages
Five Types of Information Systems
Information systems are constantly changing and evolving as technology continues to grow. Very importantly the information systems described below are not mutually exclusive and some (especially Expert Systems, Management Information Systems and Executive Information Systems are can be seen as a subset of Decision Support Systems). However these examples are not the only overlaps and the divions of these information systems will change over time.
At present there are five main types: |Transaction Processing Systems (TPS) |
|Decision Support Systems (DSS) |
|Expert Information Systems (EIS) |
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Management Information Systems

These systems assist lower management in problem solving and making decisions. They use the results of transaction processing and some other information also. It is a set of information processing functions. It should handle queries as quickly as they arrive. An important element of MIS is database.
A database is a non-redundant collection of interrelated data items that can be processed through application programs and available to many users.

Decision Support Systems

These systems assist higher management to make long term decisions. These type of systems handle unstructured or semi structured decisions. A decision is considered unstructured if there are no clear procedures for making the decision and if not all the factors to be considered in the decision can be readily identified in advance.
These are not of recurring nature. Some recur infrequently or occur only once. A decision support system must very flexible. The user should be able to produce customized reports by giving particular data and format specific to particular situations.

Summary of Information Systems

|Catagories of Information System |Characteristices |
|Transaction Processing System |Substitutes computer-based processing for manual procedures. |
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