SDLC ITS MODEL AND SOFTWARE TESTING

Presented by-
Praveen Chaurasia
Abhinav Shukla

SDLC
A framework that describes the
activity performed at each
stage of a software
development project.

SDLC PHASES
Requirement Gathering and Analysis
 Design
Development
Testing
Implementation
Maintenance

SDLC MODEL
To help understand and implement the
SDLC phases various SDLC model
have been created by software
development expert universities and
standard organizations.

REASONS FOR USING
SDLC MODEL
 Provides basis for project planning ,estimating
and scheduling
Provide framework for standard set of
terminologies, activity& deliverable
Provide mechanism for project tracking &
control
Increase visibility of project progress to all
stakeholders

Advantage of choosing
An Appropriate SDLC
 Increase development speed
Increase product quality
Improve tracking and control
Improve client and relation
Decrease project risk
Decrease project management overhead

COMMON LIFE CYCLE
MODELS
 Waterfall
Spiral
Agile

WATERFALL MODEL
Oldest and most well known SDLC model
Follow a Sequence step by step process from
requirement analysis to maintenance
System that have well-define and understood
requirements are good fit for waterfall model

User Requirements
Software Requirements
Architecture Design
Detailed design & Coding
Testing
Delivery
”Swimming
upstream”
The Waterfall
Lifecycle Workflow

ADVANTAGE OF
WATERFALL MODEL
 Easy to understand
Provide structure
Set requirement stability
Good for management control

DISADVANTAGE OF
WATERFALL MODEL
It does not allow for much reflection or
revision.
Estimating time and costs with any degree of
accuracy is often extremely difficult.
Designs that look feasible on paper turn out
to be expensive or difficult in practice.

SPIRAL MODEL
 Process is represented as a spiral rather than as a
sequence of activities with backtracking.
Each loop in the spiral represents a phase in the
process.
 Suitable for large, expensive and complicated projects

ADVANTAGE OF
SPIRAL MODEL
Risks are explicitly assessed and resolved
throughout the process.
Software engineers can start working on the project
earlier rather than wading through a lengthy early
design process.

DISADVANTAGE OF
SPIRAL MODEL
Requires highly skilled people in risk analysis and
planning
Requires more time, and is more expensive
Estimates of budget and time are harder to judge at
the beginning of the project since the requirements
evolve through the process

AGILE(XP) MANIFESTO
XP = Extreme Programming emphasizes:
Individuals and interactions
– Over processes and tools
Working software
– Over documentation
Customer collaboration
– Over contract negotiation
Responding to change
– Over following a plan

AGILE PRINCIPLES
 Continuous delivery of software
Continuous collaboration with customer
Continuous update according to changes
Value participants and their interaction
Simplicity in code

AGILE ADVANTAGE
 Lightweight methods suit small-medium size
projects
Produces good team cohesion
Emphasises final product
Iterative
Test based approach to requirements and quality
assurance

AGILE DISADVANTAGE
 Difficult to scale up to large projects where
documentation is essential
Needs experience and skill
Programming pairs is costly
Test case construction is a difficult and specialised
skill

SOFTWARE TESTING
“Testing is the process of executing a program
with the intention of finding errors.”
“Testing can show the presence of bugs but
never their absence.”

OBJECTIVE TESTING
 uncover as many as error(or bug) as possible in a
given produce.
 Demonstrate a given software product matching
its requirement specification.
 Validate the quality of a software testing using the
minimum cost and effort.
 Generate high quality test case, perform effective
test and issue correct and helpful problem report.

TESTING METHOLOGY
 BLACK BOX TESTING
 WHITE BOX TESTING

BLACK BOX TESTING
 No knowledge of internal program design or code
required
 Testing are based on requirement and functionality

WHITE BOX TESTING
 Knowledge of the internal program design and
code required.
Test are based on coverage of code
statement,branches,path,condition.

LEVEL OF TESTING
 Unit testing
 Integration testing
 System testing

UNIT TESTING
 Test each module individually.
 Follows a white box testing.

INTEGRATION TESTING
 Once all modules have been tested, integration testing is
perform.
 It is systematic testing
 Produce test to identify errors associated with interfacing.
TYPES:-
 Big bang integration testing
 Top down integration testing
 Bottom up integration testing
 Mixed integration testing

SYSTEM TESTING
 This system as a whole is tested to uncover requirement
errors.
 verifies that all system element work properly and that
overall system function and performance has been
achieved.
TYPES:-
 Alfa testing
 Beta testing
 Acceptance testing
 Performance testing

SDLC ITS MODEL AND SOFTWARE TESTING

SDLC ITS MODEL AND SOFTWARE TESTING

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