Analysis and Design of Information Systems

Analysis and Design of IS

1. SYSTEM REQUIREMENTS
SPECIFICATION
UNIT III

2. What we going to Study?
•Use of Document flow diagrams
•Use of Data flow diagrams
•Specification of operational, tactical
and strategic IR by user
•Data Dictionary

3. OVERVIEW OF DESIGN OF IS
•Requirements Determination
•Requirements Specification
•Feasibility Analysis
•System Specification
•Hardware Study
•System Design
•System Implementation
•System Evaluation
•System Modification / Maintenance

4. Requirements Determination
•Determining the users Requirements
•System should meets the users
expectation and requirements
•Deals with what the user expects and
what the user got?
•Top-Level Manager will deals with the
requirements and he will manage the
complete execution/implementation of the
system

5. Requirements Specification
•Checking the users requirements
•Analyzing the users requirements and
draw up the understandable plan of what
the system will provide as output
•Determine the needs and priority of the
users
•Detailed specification should be provide
to users.

6. Feasibility Analysis
•Checking the Resources
•Checking the Computing equipments
•Checking the Manpower required to
complete the process
•Estimating the cost
•Complete report of the available
resources.

7. Final System Specifications
•System Requirements
•System Specifications
•Feasibility analysis
•Budget to implement the system
•Physical requirements ( Memory Storage
and Processor speed)

8. Hardware Study
•Hardware requirements
•What are the hardware required to
execute the application?
•Determine Response time, Volume of data
to be processed, Frequency of reports etc
& then pick the hardware.
•CPU
•Memory etc

9. System Design
•Study of Logical Design of System
•Input Design
•Data Flow Design
•Use Case Design
•ER Design
•Database Design

10. System Implementation
•Writing Programs
•Creating Databases
•Testing programs
•Preparing the Documentation
•Installing the system
•Checking Trial of the newly designed
system
•Checking the system meets users
requirements

11. System Evaluation
•Find out from users whether the system
meets users requirements
•Study of system life cycle
•Getting the evaluation report and
suggestion from the user for further
improvement

12. System Life Cycle

13. System Modification
•Changing the modules
•Adding Features
•Deleting the Features