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Advances in computer-based information technology in recent years have led to a wide variety of systems that managers are now using to make and implement decisions. By and large, these systems have been developed from scratch for specific purposes and differ significantly from standard electronic data processing systems. Too often, unfortunately, managers have little say in the development of these decision support sysems; at the same time, non-managers who do develop them have a limited view of how they can be used. In spite of these drawbacks, the author found that a number of the 56 systems he studied are successful. And the difference between success and failure is the extent to which managers can use the system to increase their effectiveness within their organizations. Thus, the author suggests that this is the criterion designers and managers should jointly ascribe to in exploiting the capabilities of today’s technologies.
What can managers realistically expect from computers other than a pile of reports a foot deep dumped on their desks every other week?
A version of this article appeared in the November 1976 issue of Harvard Business Review.
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No single system can provide all the information an organization needs. Even small firms have a collection of different systems: e-mail systems, sales tracking systems, etc. Different systems can be described through:
- A functional perspective: Identifying systems by their major business function
- A constituency perspective: Identifying systems in terms of the major organizational groups that they serve
- Sales and marketing information systems help the firm with marketing business processes (identifying customers for the firm's products or services, developing products and services to meet their needs, promoting products and services) and sales processes (selling the products and services, taking orders, contacting customers, and providing customer support).
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Figure 2-4
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- Human resources information systems maintain employee records, track employee skills, job performance and training, and support planning for employee compensation and career development.
Figure 2-5
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There are four main categories of systems from a constituency perspective.
- Transaction processing systems (TPS) are basic business systems that serve the operational level of the organization by recording the daily routine transactions required to conduct business, such as payroll and sales receipts.
- Management information systems (MIS) serve middle managers' interests by providing current and historical performance information to aid in planning, controlling, and decision making at the management level. MIS typically compress TPS data to present regular reports on the company's basic operations.
Figure 2-6, Figure 2-7
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- Decision support systems (DSS), or business intelligence systems, help managers with non-routine decisions that are unique, rapidly changing, and not easily specified in advance. DSS are more analytical than MIS, using a variety of models to analyze internal and external data or condense large amounts of data for analysis.
Figure 2-8
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- Executive support systems (ESS) provide a generalized computing and communications environment that help senior managers address strategic issues and identify long-term trends in the firm and its environment. ESS address nonroutine decisions requiring judgment, evaluation, and insight because there is no agreed-on procedure for arriving at a solution. ESS present graphs and data from many internal and external sources through an interface that is easy for senior managers to use. Often the information is delivered to senior executives through a portal, which uses a Web interface to present integrated personalized business content.
Figure 2-9
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Ideally, these constituency-based systems are interrelated. TPS are typically a major source of data for other systems, whereas ESS are primarily a recipient of data from lower-level systems and external sources.
Figure 2-10
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