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Overview of IS

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  2

Why Do People Need Information?

- Individuals :Entertainment andenlihtenment

- !usinesses :De"ision ma#in$

pro%lem solvinand "ontrol

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  &

Data ' Information

(Data vs) Information * Data

(  + ,iven$ or fa"t. a num%er$ a statement$ or api"ture

( /epresents somethin in the real world( 0he raw materials in the produ"tion ofinformation

 * Information( Data that have meanin within a "onte1t

( Data in relationships

( Data after manipulation

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Data 3anipulation

E1ample: "ustomer survey

- /eadin throuh data "olle"ted from a

"ustomer survey with 4uestions in various

"ateories would %e time-"onsumin and notvery helpful)

- When manipulated$ the surveys may provide

useful information)

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  5

Information

( 6eneratin Information

7omputer-%ased ISs ta#e data as raw

material$ pro"ess it$ and produ"e information

as output)

Input-process-output

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  8Characteristics of useful information

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System

( What Is a System? * System: + set of "omponents that wor#toether to a"hieve a "ommon oal

 * Su%system: One part of a system where

the produ"ts of more than one systemare "om%ined to rea"h an ultimate oal

 * 7losed system: Stand-alone system thathas no "onta"t with other systems

 * Open system: System that interfa"eswith other systems

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Data$ Information$ and Systems

Several subsystems make up this corporate accounting system

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( Information and 3anaers

Systems thin#in

( 7reates a framewor# for pro%lemsolvin and de"ision ma#in)

( <eeps manaers fo"used on overall

oals and operations of %usiness)

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  =>

Data$ Information$ and Systems

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Data$ Information$ and Systems

Components of an information system

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  =&

0he our Staes of Data Pro"essin

=) Input : Data is "olle"ted and entered into

"omputer)2) Data pro"essin : Data is manipulated into

information usin mathemati"al$ statisti"al$ and

other tools)

&) Output : Information is displayed or presented)

) Storae : Data and information are maintained

for later use)