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doc anaylsis and design 1a
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Lecture notes of 5 pages for the course Diploma In Information Technology at DCC (notes)
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STUDY NOTESWeek 1
INTRODUCTION TO SYSTEM ANALYSIS AND DESIGN
1. Introduction: This is an introduction to information system and why it is needed by
organisations to support their daily operations.
2. Outcomes:
Describe the impact of information technology on society
Describe the five main components of an information system
Explain Internet business strategies and
relationships, including B2C and B2B
Explain how to use business profiles and models
Understand the seven types of information systems used in business
Describe the types of information the four classes of users need
2. Notes:
1.1 Information System- An integrated set of components for collecting, storing, and
processing data and for providing information, knowledge, and digital products.
Information Concepts
Data, information, and knowledge
Data: Raw facts
Information: Collection of facts organized in such a way that they have additional value
beyond the value of the facts themselves
Process: Set of logically related tasks performed to achieve a defined outcome
Knowledge: Awareness and understanding of a set of information
, Data, Information, and Knowledge
DATA TO INFORMATION
The Characteristics of Valuable Information
• If information is not accurate or complete
– People can make poor decisions, costing thousands,
or even millions, of dollars
• Information can be of little value to the organization
– If information is not relevant, not delivered to
decision makers in a timely fashion, or too complex
to understand
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