Systems Analysis And Design Essay
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Systems Analysis and Design
Spring 2000
Chapter 1
Review Questions pg 1.28-29
1. A procedure is a specific task that needs to be done to produce output. A system is a group of related procedures for a particular business function.
2. Data is another word used for input, and information is another word used for output.
3. The components of an information systems (IS) are hardware, software, data, procedures, and people.
Hardware: physical layer of information system.
Software: system and application software.
Data: Vital component of every system
Procedures: define tasks that must be performed by people who work with the system
People: primary purpose of IS is to provide valuable info to managers and users.
4. All information either is produced directly or derived from data.
5. An information systems is the effective use of hardware, software, data, procedures, and people to achieve specific results that support the company's business objectives.
6. Common business information systems consist of: purchasing system, production system, marketing system, receivables system, finance system, and human resource system.
7. EDI is the computer-to-computer transfer of data between companies. An example of this is computerized filing of income taxes.
8. No, the Saturn web-site does not describe the company's corporate culture because corporate culture is the set of beliefs, rules, traditions, values, and attitudes that define a company's personality and its' not possible to view all these things through a web-site.
9. The four factors that affect the complexity of a business information system are:
1. Relationships with other systems
2. Boundaries
3. Specialized business needs
4. Size of a company
10. The six types of information systems are:
1. Operational-- process data generated by the day-to-day business transactions of a company
2. Management information system-- computer based system that generates timely and accurate information for top, middle, and lower managers.
3. Executive information system-- supports the information requirements of top level managers and their need to make unstructured decisions…combines features and capabilities of both MIS and decision support system.
4. Decision support system-- what if analysis..effect on company if sales increase by 10 percent and costs go up by 5 percent….designed to help make business decisions by analyzing internal or external data.
5. Expert system-- stimulate human reasoning and decision making by combining the subject knowledge of human experts, called the knowledge base, and inference rules that determine how the knowledge is used to reach decisions.
6. Office systems-- e-mail, video conferencing, voice mail, fax, word processing, desktop, spreadsheets.
11. The four organizational levels and their Information system requirements:
1. Top managers-- executive info. Systems, MIS summaries, decision support systems, office systems
2. Middle managers-- MIS summaries, and expectations, decision support systems, office systems.
3. Lower managers-- operational systems details, some MIS summaries and exceptions, office systems
4. Operational personnel-- operational systems detail, expert system, office system
12. The systems development life cycle is a series of steps that companies use to build on information systems.
13. Phase 1: Systems planning
-starts with a written request called a systems request, that identifies the information system and describes the desired changes or improvements.
-identify clearly...
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