Data ProcessingInformation The basic information system model Data ProcessingInformation Data Storage The basic model with data storage Figure:-6.1:- Basic.

Data Processing Information

The basic information system model

Data Processing Information

Data Storage

The basic model with data storage

Figure:-6.1:- Basic information Systems Model

Application subsystems

Order entry and billing

Payroll and personal

Marketing management

Inventory accounting and management

Application subsystem makes use of functional subsystems

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Figure:6.2:- Basic Information Systems Model

Files

Transaction processing

Operational control reports

(b) Control reportsTransaction output

Transactions

Files

Transaction processing

(a) Transaction

Inquiry response

Operational report

processingInquiry

Files

(c) Inquiry Processing

Figure:6.3:- Processing to support operational control.

Processing Programs

Data base

Inquiry

Processing

Decision models

Problem analysis model

Variance

reporting

Planning/budget models

Requests inquiries

problems Etc

Plans and budgets Scheduled reports, Special reports Analyses decision

for review inquiry responses

Other

Budgets, standards,

plans. etc

Transaction based files

Figure:6.4:- Management Control database and processing support

Sort

processdisseminate

Customer

Suppliers

Business Units

Functional departments

CompetitorsOthers

Data collection Classify

RetrieveDuplicate

Goals and mission

store

ACTION

Decision maker-n

Decision maket-2

Decision maker-1

Figure:-6.1:data are collected from different sources and processed using a series of steps

CATEGORIES OF INFORMATION SYSTEMS

TRANSACTION PROCESSING(TP)MANAGEMENT INFORMAION SYSTEM(MIS) Intelligent support systems (ISS), which consist of decision support systems (DSS) , executive information systems (EIS) , and expert systems (ES).

Information Systems are classified in four types of information systems:

Office automation systems (OAS)

DECISION SUPPORT SYSTEMS(DSS)Decision support systems (DSS) are interactive, well-integrated systems that provide managers with data , tools , and models to facilitate semi structured decisions or tactical decisions.

How a DSS works A DSS accesses and processes large volumes of internal and external data and integrates them with various decision-making models . Internal data are often downloading from the TPS or from other information systems.

Internal Data

External Data

Decision-making Models

Alternative solutions to problems “ What-if”

analysis Goal seeking

Word processing

Desktop publishing

Electronic mail

Voice mail

Video conferencing

Image

Fax

E. m. systems

Multimedia

Knowledge Workers

Office automation

systems

Clerical workers

Figure:6.5:-An Office automation system (OAS) is designed to increase productivity and enhance communications in the workplace.

Methods and

procedures

Computer software

Information System IPO Component

Data Storage

IPO Component

(Process)

Internal control

component

Data (Input)

Business system (environment)

Figure:6.6:- The Input process-Output Components of the Information

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Information Systems Applications