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Note for System Analysis and Design - SAD by RATNESH YADAV

  • System Analysis and Design - SAD
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Ratnesh Yadav
Ratnesh Yadav
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Information Systems and Information Technology? • Vital component of successful businesses • Helps businesses expand and compete • Businesses use IS and IT – To improve efficiency and effectiveness of business processes – For managerial decision making – For workgroup collaboration 1- 1

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What is a system? • A system – Is a set of interrelated components – With a clearly defined boundary – Working together to achieve a common set of objectives – By accepting inputs and producing outputs in an organized transformation process 1- 2

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Systems have three basic functions: • • • Input involves capturing and assembling elements that enter the system to be processed Processing involves transformation process that convert input into output Output involves transferring elements that have been produced by the transformation process to their ultimate destination 1- 3

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What is an Information System? • An organized combination of – People – Hardware – Software – Communications networks – Data resources – Policies and procedures • That stores, retrieves, transforms, and disseminates information in an organization 1- 4

Lecture Notes