Different Type of Information System
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) |
|Management Information Systems (MIS |
|Office Automation Systems (OAS) |
Types of Information Systems
Information systems differ in their business needs. Also depending upon different levels in organization information systems differ. Three major information systems are 1. Transaction processing systems 2. Management information systems 3. Decision support systems
Figure 1.2 shows relation of information system to the levels of organization. The information needs are different at different organizational levels. Accordingly the information can be categorized as: strategic information, managerial information and operational information.
Strategic information is the information needed by top most management for decision making. For example the trends in revenues earned by the organization are required by the top management for setting the policies of the organization. This information is not required by the lower levels in the organization. The information systems that provide these kinds of information are known as Decision Support Systems.
[pic]
Figure 1.2 - Relation of information systems to levels of organization
The second category of
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) |
|Management Information Systems (MIS |
|Office Automation Systems (OAS) |
Types of Information Systems
Information systems differ in their business needs. Also depending upon different levels in organization information systems differ. Three major information systems are 1. Transaction processing systems 2. Management information systems 3. Decision support systems
Figure 1.2 shows relation of information system to the levels of organization. The information needs are different at different organizational levels. Accordingly the information can be categorized as: strategic information, managerial information and operational information.
Strategic information is the information needed by top most management for decision making. For example the trends in revenues earned by the organization are required by the top management for setting the policies of the organization. This information is not required by the lower levels in the organization. The information systems that provide these kinds of information are known as Decision Support Systems.
[pic]
Figure 1.2 - Relation of information systems to levels of organization
The second category of