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17-1 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Managing Information Systems and Technology Managing Information Systems and Technology 17
17-2 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Information and the Manager Data: raw facts such as the number of customers. Information: data arranged in a meaningful fashion. Good information possesses these attributes: Information Quality: measures information accuracy and reliability. Timeliness: information is needed when managerial action is taken. Real Time Information: reflects the current condition. Completeness: manager has the information to act. Relevance: information matches the managers specific needs at hand. Irrelevant information does not apply
17-3 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Information Attributes HighQualityHighQuality RelevantRelevantTimelyTimely RelativelyCompleteRelativelyComplete UsefulInformationUsefulInformation Figure 17.2
17-4 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Information Systems & Technology Information System: acquires, organizes, stores, manipulates and transmits information. A Management Information System is the plan and design of an Information System to provide managers with information. Can be paper or computer-based. Information technology: is the means for acquiring, organizing, storing, manipulating, and transmitting information. Information technology power has increased rapidly. Information and Decisions: managing has to do with making decisions. Good Information allows effective decision making.
17-5 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Using Information Information and control: control allows managers to regulate the efficiency and effectiveness of the organization. Effective control requires good information. Information technology in the form of computers allows managers quick access to information. Information and Coordination: managers must coordinate departmental actions to achieve goals. Information Systems provide information on suppliers, production schedules, and orders to allow coordination.
17-6 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Information Technology Revolution Information Technology began with early computers. Computers are called hardware and use digital 1’s and 0’s to represent data. Modern computers use microprocessors such as the Pentium to access information. Computer cost has dropped dramatically while the power of computers has risen. Computers cost less and do more than ever before. Connecting one computer to another is also much easier and cheaper.
17-7 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Price Performance Ratio of Computers $400k $300k $200k $100k $3k Cost per MIP Figure 17.3
17-8 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Computer Communications Wireless communications: connects managers and computers together without wires. Cellular has grown rapidly to over 20 million users. Wireless modems connect one computer to another. Networks: share information between computers. Server Computer: powerful computer that relays information to client computers. Servers and other computers are connected on a Local Area Network or LAN Mainframe: large computers processing vast amounts of information. Internet: a world wide network of computers.
17-9 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., Tier Information System ServerServerServerServerServerServer ClientClient ClientClient ClientClient ClientClient Mainframe Hub Mainframe Hub WirelessLinkWirelessLink LaptopLaptop Figure 17.4
17-10 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Software Developments Operating system software: tells the computer how to run itself. Applications software: provide for functions such as word processing, spreadsheets, and graphics. The new software provides far better access to information for managers. Artificial Intelligence: behavior by a machine that can be called intelligent. Computers evaluate problems & act on simple tasks. Speech Recognition: allow a computer to hear and act on spoken commands. Powerful programs are still being developed.
17-11 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Types of Information Systems Transaction Processing Systems (TPS): designed to handle large volumes of routine transactions. The first computer-based Information System. Billing, payroll, supplier payments are examples. Operations Information Systems (OIS): gathers comprehensive data, organizes it and summarizes it in a form valuable to managers. Can help managers with non-routine decisions such as customer service and productivity. Provides sales, inventory & performance oriented data.
17-12 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Types of Information Systems Decision Support Systems (DSS): provides interactive models to help managers make better decisions. Excellent for unusual, non-programmed decisions Analyzes investment potential, new product pricing. Often used by middle and upper managers. Executive Support System (ESS): sophisticated version of a DSS to match top manager’s needs. Focus on user friendly features. Expert Systems: employees human knowledge captured in a computer to solve problems usually requiring human insight. Use Artificial Intelligence to recognize, formulate, solve problems, and learn from experience.
17-13 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Types of Information Systems Transaction Processing Systems Operations Information System Decision Support Systems Expert Systems Programmed Decision Making Non-Programmed Decision Making Figure 17.5
17-14 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Information Systems Impacts Information Systems have provided managers with better information, enabling better decision making. Effective Information Systems can be a source of competitive advantage. Computer-based information systems are associated with decentralization of managerial decision making. Flattening the Organization: information systems reduce the need for the hierarchy to control the firm. Managers control and coordinate using the system, not workers.
17-15 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Information Systems Impacts Horizontal Information Flows: Information networks can bridge functional departments. Allow information to flow horizontally between departments. Can lead to much higher productivity, quality, and innovation. Virtual products: firms can use their information system to custom tailor goods and services to each customer. Systems can allow this at no increase in cost.
17-16 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Information Systems Impact on Organizational Hierarchy Before Tall structure primarily up and down communication After Flat structure both up-down and lateral communication Figure 17.6
17-17 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Barriers to Information Systems Technological factors: consistent standards for systems do not exist. Makers of hardware use different standards. Makes it hard to share information between systems. Resistance by Individuals: many managers do not use the system fully. Some managers are afraid of technology or do not understand it. Political Resistance: the information system changes the way information flows in the firm Some managers feel threatened by it. Managers may think they will be laid-off.
17-18 Irwin/McGraw-Hill ©The McGraw-Hill Companies, Inc., 2000 Limitations to Information Systems Loss of the human element: information systems cannot present all kinds of information accurately. Thick information, which is rich in meaning and not quantifiable, is best suited to human analysis. Example: employee evaluations need face-to-face communication to convey all information. Difficult installations: Information systems can be hard to develop. To avoid problems: list major organization goals. build support for the system with workers. create formal training programs. emphasize that face-to-face contact is important.
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