1. Analysis & Design of
Information System
Organized By: Vinay Arora
Assistant Professor
CSED, Thapar University
www.slideshare.net/aroravinay

2. Disclaimer
This is NOT A COPYRIGHT MATERIAL
Content has been taken mainly from the following books:
System Analysis and Design Methods By Jeffrey L Whitten & Lonnie D Bentley ,
Analysis & Design of Information Systems By James A. Senn,
System Analysis & Design By Elias M. Awad,
Modern System Analysis & Design By Jeffrey A. Hoffer, Joey F.George & Joseph
S. Valacich
Vinay Arora
CSED

3. ADofInfoSys
System – Set of Components that Interact to accomplish some purpose.
Information System – Means by which data flow from one person or department
to another.
System’s Type – Open and Closed.
Element of Control.
Standards for Systems – Acceptable Level of Performance.
Impact of Information System on Information Economy: Smart Working,
Information taking precedence.
System Analysis & Design – Process of Examining a Business situation with the
intent of improving it through better procedures & methods.
Vinay Arora
CSED

4. ADofInfoSys
System Study - Activity that Precede all other Analysis activities.
System Analysis – Process of Gathering & Interpreting Facts, Diagnosing
Problems and Using information to recommend Improvements to the System.
To Proceed – One must understand the working of Existing system and Flow of
Information.
Analysis Specifies – What the System should do.
System Design – Process of Planning a new approach OR one to replace OR
complement an existing system.
Design Specifies – How to Accomplish the Objective.
Vinay Arora
CSED

5. System Analyst
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6. ADofInfoSys
System Analyst – Complete System Study, Understanding Details of
situation and deciding whether improvements are desired or not, All in
the light of Business.
System Analyst – System Analysis + Design + Programming.
End User’s Categories: Hands-on, Indirect, User Management, Senior
Management.
Categories of Information System: TPS, MIS, DSS.
Vinay Arora
CSED

7. TPS
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TPS Operations
Vinay Arora
CSED

8. ADofInfoSys
Approaches to the Development of Computer Information System:
# System Development Life Cycle Method.
# Structured Analysis Development Method.
# Systems Prototype Method.
Vinay Arora
CSED

9. Vinay Arora
CSED

10. Start to End
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CSED

11. System Development Life Cycle Method
Preliminary Investigation – Request Clarification, Feasibility Study and Request
Approval.
Determination of System Requirements – Detailed Investigation.
Design of System.
Development of Software.
Systems Testing.
Implementation.
Evaluation – Operational Evaluation, Organizational Impact, User Manager
Assessment, Development Performance.
Vinay Arora
CSED

12. SDLC
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CSED

13. Determination of System Requirements
What is being done?
How is it being done?
How frequently does it occur?
How great is the volume of transactions or decisions?
How well is the task being performed?
Does a Problem exist?
If a problem exists, how serious is it?
If a problem exists, what is the underlying cause?
Vinay Arora
CSED

14. Structured Analysis Development Method
Structured Analysis – What the System has to do?
Elements of Structured Analysis – Graphic Description, Data Flow Diagrams,
Data Dictionary
Systems Prototype Method:
Defining Prototype.
When to use Prototype – No System already present as proposed one, Partial
Features are known, Requirements not known fully, Evolving Alternate
versions.
Prototyping Process – Identify the user’s known info., requirements, Develop
working prototype, Use this model, Note changes required, Revise Prototype,
Repeat steps.
Vinay Arora
CSED

15. Structured Analysis
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16. Prototype
Systems Prototype Method
Defining Prototype - A Prototype is an original type, form, or instance
of something serving as a typical example, basis, or standard for other
things of the same category.
When to use Prototype – No System already present as proposed one,
Partial Features are known, Requirements not known fully, Evolving
Alternate versions.
Prototyping Process – Identify the user’s known info., requirements,
Develop working prototype, Use this model, Note changes required,
Revise Prototype, Repeat steps.
Vinay Arora
CSED

17. Advantages of prototyping
May provide the Proof of concept necessary to attract funding
Early visibility of the prototype gives users an idea of what the final system looks like
Encourages active participation among users and producer
Enables a higher output for user
Cost effective (Development costs reduced)
Increases system development speed
Assists to identify any problems in earlier design, requirements analysis and coding
activities
Various aspects can be tested and quicker feedback can be got from the user
Vinay Arora
CSED

18. TECHNICAL Feasibility
TECHNICAL Feasibility:
Can the work for the Project be done with current equipments, existing
software technology, and available personnel?
If new technology is required, what is the likelihood that it can be
developed?
Vinay Arora
CSED

19. ECONOMIC Feasibility
ECONOMIC Feasibility:
Are there sufficient benefits in creating the system to make the cost
acceptable?
Are the costs of NOT creating the system so great that the project must
be undertaken?
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CSED

20. OPERATIONAL Feasibility
OPERATIONAL Feasibility:
Will the system be used if it is developed and implemented?
Will there be resistance from users that will undermine the possible
application benefits?
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CSED

21. Evaluation
Evaluation is performed to evaluate the STRENGTH & WEAKNESSES
of a SYSTEM.
Dimensions for Evaluation:
# Operational Evaluation
# Organizational Impact
# User Manager Assessment
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CSED

22. OPERATIONAL Evaluation
Ease of USE.
Response Time.
Suitability of Information Formats.
Overall Reliability.
Level Of Utilization.
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CSED

23. ORGANIZATIONAL Impact
Benefits to Organization (Cost, Revenue and Profit).
Operational Efficiency .
Competitive Impact.
Vinay Arora
CSED

24. Reference List
1. System Analysis and Design Methods By Jeffrey L Whitten & Lonnie D Bentley
2. Analysis & Design of Information Systems By James A. Senn
3. System Analysis & Design By Elias M. Awad
4. Modern System Analysis & Design By Jeffrey A. Hoffer, Joey F.George & Joseph S. Valacich
etc…….
Vinay Arora
CSED

25. Thnx…
Vinay Arora
CSED