Systems Analysis and Design

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Transaction Processing Systems (TPS) For business transactions which involves collection, modification and retrieval of all transaction data Highlights performance, reliability and consistency ATOMIC: all database changes for an entire transaction are completed CONSISTENT: updates changes in database ISOLATED: concurrent applications do not interfere each other DURABLE: Complete database operations are permanently written Information Processing System

description

Prepared by: Nicole Eusebio

Transcript of Systems Analysis and Design

Page 1: Systems Analysis and Design

Transaction Processing Systems (TPS)

For business transactions which involves collection, modification and retrieval of all transaction data

Highlights performance, reliability and

consistency

ATOMIC: all database changes for an entire transaction are completedCONSISTENT: updates changes in database

ISOLATED: concurrent applications do not interfere each otherDURABLE: Complete database operations are permanently written

Information Processing

System

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Where is it used?

• adapt to the availability of application servers• Controlling the rate and order of tasks that are processed

Scheduling and load balancing

• Maintains operating system resources to be used• loads application programs

Managing system resources

• Monitors the progress of task• Adjusts task prioritiesMonitoring

• Obtaining required data needed by tasks• locking data for update and logging changesManaging data

• Monitoring communications with users, servers and systems

• managing data handling and conversion

Managing Communications

• starting tasks at predefined times• logging the date and time of events onto diskTime Management

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Examples

ATM

Airline Reserva

tion System

Online Ticketin

g

Credit Cards

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Office Automation Systems (OAS)

collects processes

storestransmits electronic messages

Computer Based

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Where is it used? (office)

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Examples

Office support system

word processing

Spreadsheet

Presentation tool Database scheduler

Message handling systemFAX E-mail Voice Mail

Document ManagementWord

processingWord

processingWord

processingImage

processing

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Knowledge Work Systems (KWS)

Managing knowledge in organizations

Supports creation, capture, and storage

Helps in dissemination of information

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Where is it used?Fo

r org

aniz

ati

ons

wit

h:

Feedback database: shares this feedback with their design and research and

development departments

Shared project files: shared files and information that allows everyone on the team

to work collaboratively

Research files: conducts focus groups to find out what is needed in their product or market niche

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Examples

CAD Systems

• Computer Aided Design

• Automate creation and revision of design

• Provide precise manufacturing control

Case-Based Reasoning System

• Represents knowledge as cases – descriptions of problems with solutions

Investment Work Stations

• High-end PC in the financial sector

• Used to analyze trading situations instantaneously

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Decision Support System (DSS)

supports business and organizational decision-

making activities

properly designed Decision Support System

interactive software-based system intended to help decision makers compile

useful information

helps identify and solve problems and make

decisions

computerized information

system

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Where is it used?

Business

• Accessing all of your current information assets

• Comparative sales figures between one week and the next

• Projected revenue figures based on new product sales assumptions

• consequences of different decision alternatives, given past experience in a context that is described

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Examples

DSS For Education Decisions

DSS for Financial Decision

s

DSS for Insuranc

e Decision

s

DSS for Purchasi

ng Decision

s

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Executive Support Systems (ESS)

allows you to turn your

organization's data into useful

summarized reports

billing, cost accounting ,

staffing, scheduling, and more

Summarizes company’s

performance

gain direct access to

information

access to reports coming from all company levels

and departments

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Where is it used? Top Level Management

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Examples

Executive Information System:

Cambridge Systematic (investment

plan)

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Group Decision Support Systems (GDSS)

Definition

assists users in making decisions by

facilitating group collaboration

supports project collaboration through the enhancement of digital

communication with various tools and

resources

includes features such as presentation material,

commenting and brainstorming, voting and

evaluation of decisions

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Where is it used? Group collaboration

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Examples

Group Discussion Room (GDR)• Electronic meeting

Gdocs• Commonly used by students in

group papers