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Systems Analysis andDesign 9thEdition
Chapter 1
Introduction to Systems
Analysis and Design
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Chapter Objectives
Discuss the impact of informationtechnology on business strategy
andsuccess
Dene an information system and describeits components
E!plain ho" proles and models canrepresent business functions
andoperations
E!plain ho" the Internet has a#ectedbusiness strategies and
relationships
Identify various types of information$
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Chapter Objectives
Distinguish bet"een structured analysis%object&oriented
analysis% and agile methods
Compare the traditional "aterfall model
"ith agile methods and models Apply ve basic guidelines for
systems
development
Discuss the role of the informationtechnology department and the
systemsanalysts "ho "or' there
(
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Introduction
Companies useinformation as a"eapon in the battle toincrease
productivity%
deliver )uality productsand services% maintaincustomer loyalty%
andma'e sound decisions
Information technologycan mean thedi#erence bet"eensuccess and
failure
*
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+he Impact of Information
+echnology
Information +echnology ,I+- Combination of hard"are and
soft"are
products and services that companies
use to manage% access% communicate%and share information
+he .uture+hree issues that "ill shape the future
Changes in "orld
Changes in technology
Changes in client demand
/
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+he Impact of Information
+echnology
Systems Development 0usiness information systems are
developed by people "ho are technically
)ualied% business&oriented% and highlymotivated
ust be good communicators "ith
strong analytical and critical thin'ings'ills
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+he Impact of Information
+echnology
Systems Analysis and Design Systems Analysis and Design
Step&by&step process for developing high&
)uality information systems
Systems Analyst 3lan% develop% and maintain information
systems
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+he Impact of Information
+echnology
5ho develops Information Systems6 In&house applications
Soft"are pac'ages
Internet&based application services
Outsourcing
Custom solutions
Enterprise&"ide soft"are strategies 7o" versus 5hat
8
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Information SystemComponents A system is a set of related
components that
produces specic results
A ission&critical system is one that is vital to a
companys operations Data consists of basic facts that are
the
systems ra" material
Information is data that has been transformed
into output that is valuable to users Information systems have
ve 'ey components:
hard"are% soft"are% data% processes% and people
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Information SystemComponents 7ard"are
Is the physical layerof the information
system oores ;a"
Soft"are System soft"are
Application soft"are Enterprise
applications
1
