SYSTEM DESIGN

1. SYSTEM DESIGN
Prepared By :
Neeraj Bhandari
Subir Thapa
Shreeansh Budathoki
Bivek Yadav
Kunal Gaur

2. SYSTEM DESIGN
 System Analysis Describes What A System Should To Do To Meet The
Information Need Of The User. System Design Specifies How The
System Will Accomplish This Objective.
 System Design Consists Of Design Activities
• That Produce System Specifications
• Satisfying The Functional Requirements
• Developed In The Systems Analysis Stage.

3.  System Design Consists Of Both Logical Design And Physical Design Activities
1. Physical System Design
2. Architectural Design
3. Logical System Design
1.Physical Design
The Physical Design Relates To The Actual Input And Output Processes Of
The System.
This Is Laid Down In Terms Of How Data Is Input Into A System, How It Is
Verified/Authenticated, How It Is Processed, And How It Is Displayed As
In Physical Design.
2. Architectural Design
The Architectural Design Of A System Emphasizes On The Design Of The Systems
Architecture Which Describes The Structure, Behaviour, And More Views Of That
System.

4. 3.Logical Design
 The Logical Design Of A System Pertains To An Abstract
Representation Of The Data Flows, Inputs And Outputs
Of The System.
 This Is Often Conducted Via Modelling, Using An Over-abstract
(And Sometimes Graphical) Model Of The
Actual System.
 In The Context Of Systems Design Are Included. Logical
Design Includes ER Diagrams I.E. Entity Relationship
Diagrams.

5. Objectives
 Describe The Strategic Planning Process, And Why It Is Important To IT Managers
 Explain The Reasons For Information Systems Projects And The Factors That
Affect Such Projects
 Describe The Initial Review Of Systems Requests And The Role Of The Systems
Review Committee
 Describe The Internal And External Factors That Affect Information Systems
Projects
 Define Operational Feasibility, Technical Feasibility, And Economic Feasibility
 Describe The Steps And End Product Of A Preliminary Investigation

7. User Interface Design
 Focuses On Designing The Interactions Between End Users
And Computer Systems.
 Designers Concentrate On - Input/ Output Methods And -
The Conversion Of Data And Information Between Human-readable
And Machine-readable Forms.
 This Is A Proto Typing Process Where Working Models Or
Prototypes Of User Interface Methods Are Designed And
Modified With Feedback From The End Users.

8. Data Design
 Focuses On
-The Design Of The Structure Of Databases And
-Files To Be Used By A Proposed Information System.
 Data Design Frequently Produces A Data Dictionary, Which
Catalogues Detailed Descriptions Of:
• The Attributes Of The Entities About Which The
Proposed Information System Needs To Maintain
Information.
• The Relationships These Entities Have With Each Other.
• The Specific Data Elements(databases, Files, Record,
Etc..) That Need To Be Maintained For Each Activity.
• The Integrity Rules That Govern How Each Data Appears

9. Process Design
 Focuses On The Development Of Software Resources, (The
Programs, Procedures) Needed By The Proposed
Information System.
 Process Design Produces Detailed Program Specifications
And Procedures Needed To Meet
-The User Interface And Data Design Specifications That
Are Developed.
-Meet The Functional Control And Performance
Requirements Developed In The Analysis Stage.

10. System Specification
• Final Design Must Specify What Types Of Hardware
Resources, Network Resources, And People
Resources Will Be Needed.
• It Must Specify How Such Resources Will Convert Data
Resources Into Information Products.
• These Specifications Are The Final Product Of The
Systems Design Stage Called System Specifications.

11. Characteristics To Be Included In System
Specification
User Interface Specifications
Content, Format, Sequence Of User Interface Products And Methods.
Database Specifications
Content, Structure, Distribution, Maintenance, Retention Of
Databases.
Software Specifications
The Required Software Package Of The Proposed System
Hardware Specifications
The Physical And Performance Characteristics Of The Equipment's
And Networks.
Personnel Specifications
Job Descriptions Of Persons Who Will Operate The System.

12. http://www.slideshare.net/neerazz