The V-Model is a software development lifecycle model where development and testing occur in sequential and inverse phases resembling the shape of a V. It is called the V-Model because the process looks like the letter V, with validation on the left side and verification on the right. The key phases include requirements analysis, design, coding, unit testing, integration testing, system testing, and acceptance testing. The V-Model allows testing to start early and to be conducted at each phase, in parallel with development. It is simple to understand but works best for smaller, well-defined projects where requirements are stable.

1. V- Model
.By sandeep
singh

2. CONTENT
q What is a V-Model?
q Why it is called a V-Model?
q V-Model Workflow
q Advantages and Disadvantages of V-Model

3. What is a V-Model?
v The V-model is a SDLC model where the
software development phase and testing
phase takes place in a linear sequential
manner in V shape.

4. Why it is called a V-Model?
v It is known as V-Model since it takes into
consideration Verification and Validation
process.
v It looks similar to “V” shape.

5. V-Model Workflow
Unit Testing
Integration
Testing
System
Testing
Acceptance
Testing
Coding
(.Exe)
Business
Requirement
Specification -
(FRS)
Low Level
Design
High Level
Design
Software
Requirement
Specification -
(FRS+NFRS)
Prepare Test Plan
Execute
Prepare Test Plan
Prepare Test Plan
Prepare Test Plan
Execute
Execute
Execute
VE
RI
FI
CA
TI
ON
VA
LI
DA
TI
O
N

6. Advantages & Disadvantages
Advantages:
Ø It is simple to use and understand since V-Model is of sequential
type.
Ø The corresponding testing phase of the development phase is
planned in parallel.
Ø This model works well for smaller projects where requirements
are very well understood.
Disadvantages:
Ø We cannot add new requirements in between of development
phases.
Ø We cannot get a working model of a software unless development
phase is complete.

7. Q&A