SDLC life cycle model for 2021 regulation OOSE

SDLC

1. System Development
Life Cycle
Vinod Kumar Sharma
Core Faculty
RTI Jaipur
PGDBA (Finance) and CISA (USA)

2. What is SDLC
A Framework
That describes the activities performed
At each stage of
A software development project

3. Approaches to Audit of System
Development Process
Concurrent Audit
Postimplementation Audit
General Audit

4. Normative Models of the System
Development Process
System Development Life Cycle Approach
Sociotechnical Design Approach
Political Approach
Soft-systems Approach
Prototyping Approach
Contingency Approach

5. SDLC
Phases
Preliminary
Investigati
on
Feasibility
Study
System
Analysis
System
Design
System
Coding
and
Testing
System
Implement
ation
System
Maintena
nce

6. Phase-I
Preliminary Investigation

7. Phase-I
Preliminary
Tasks
What is the problem
Determine if a new system is needed
Whether an alternative system will solve the
problem
Results
Need for improving the existing system is
recognised

8. Possible
Impossible
Phase-II
Feasibility Study

9. Phase-II
Feasibility Study
Tasks
Evaluate alternatives based upon
Economic Feasibility-Do benefits justify costs-Net Present
Value
Technical Feasibility-Is reliable technology and training
available
Operational Feasibility-Will the management and users
support it
Value anlaysis

10. Phase-3
System Analysis
Tasks
Detailedstudyofvariousoperations
performedbythesystem
Studyingtheexistingorganisationalhistory,
structure,andculture
Defineboundariesofthecandidatesystem
Datacollectionordatagathering

11. Phase-3
System Analysis
Tools
Data flow diagrams
Interviews
Onsite observations
Questionnaires
Data dictionaries

12. Phase-3
System Analysis
Results
SRS(SoftwareRequirementSpecification)
documentisfinalisedwhichincludes:
Functionalandnon-functionalrequirements
Whatthesystemwilldoandwhatitisnot
expectedtodo
Informationaboutothersystemswithwhich
systemmustinterface

13. Phase-4
System Design
Mostcreativeandchallengingphase
Translatestheperformancerequirementsintodesign
specifications
Tasks
Howshouldtheproblembesolved
Organisationalandjobdesignsprepared
Informationprocessingsystemsdesign
Designofthedatabase
Designoftheuserinterface
Physicaldesign
Inputdataandmasterfilesaredesigned
Outputformatsaredesigned

14. Phase-4
System Design
Results
DetailedSystemDocument
Proceduralflowcharts
Recordlayouts
Reportlayouts
Workableplanforimplementingcandidatesystem

15. Phase-5
System Coding and Testing

16. Phase-5
System Coding and Testing
Build the system to the design specifications
Develop the software
Acquire the hardware
Test the system for acceptance
Program Testing (Unit testing)
System Testing
User Acceptance Testing
Quality Assurance Testing

17. Phase-6
System Implementation

18. Phase-6
System Implementation
Covertfromoldsystemtonewsystem
Compilefinaldocumentation
Evaluatethenewsystem

19. Phase-6
System Implementation
TypesofConversion
Direct/plunge/crashapproach-entirenewsystem
completelyreplacesentireoldsystem,inone
step
Parallelapproach-bothsystemsareoperatedside
bysideuntilthenewsystemprovesitself
Pilotapproach-launchednewsystemforonlyone
groupwithinthebusiness
Phased/incrementalapproach-individualpartsof
newsystemaregraduallyphased-inovertime

20. Phase-7
System Maintenance
Keeping everything running

21. Phase-7
System Maintenance
TypesofMaintenance
Correctionofnewbugsfound(corrective)
Systemadjustmentstoenvironmentalchangesand
users’changingneeds(adaptive)
Enhancingtheperformance,changestousebetter
techniqueswhentheybecome available
(perfective)

22. Thank you