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Software Testing Methodologies and Techniques You
Should Know
SOFTWARE TESTING METHODOLOGIES
This page lists and explains the most popular software testing
methodologies and techniques thatare important to know for all
software testing.
AGILE SOFTWARE DEVELOPMENT
Agile Software Development
Agile development methods tend to promote teamwork and
collaboration. The agile development process isntsequential (code,
test, debug, release), like traditional development processes; nor
is it iterative; it combines conceptsof both.
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Twelve principles underlie the Agile Manifesto, including:
Customer satisfaction by rapid delivery of useful
softwareWelcome changing requirements, even late in
development.Working software is delivered frequently (weeks rather
than months)Working software is the principal measure of
progressSustainable development, able to maintain a constant
paceClose, daily cooperation between businesspeople and
developersFace-to-face conversation is the best form of
communication (co-location)
Projects are built around motivated individuals, who should be
trustedContinuous attention to technical excellence and good
designSimplicitySelf-organizing teamsRegular adaptation to changing
circumstances
CLEANROOM SOFTWARE ENGINEERING
The Cleanroom Software Engineering process is a software
development process intended to produce software with acertifiable
level of reliability:
Cleanroom development uses on formal methods in the design and
specification of a software product. A teamverifies that the design
correctly implements the spec.Development and testing is done using
an iterative approach, where functionality is added to the
productincrementally (as opposed to creating all of the
functionality first, THEN testing it).Software testing is performed
as a statistical experiment.
ITERATIVE SOFTWARE DEVELOPMENT
Iterative Software Development
Iterative development is at the heart of a cyclic software
development process; it starts with an initial planning andends
with deployment with the cyclic interactions in between.
Iterative development is NOT the same thing as incremental
development, although the two methodologies docomplement each
other.
Two steps are involved in iterative development:
Initialization: Creates a base version of the system.Iteration:
The current version of the system is analyzed, and is redesigned
and implemented based on theProject Control list.
RAPID APPLICATION DEVELOPMENT (RAD)
In place of extensive planning, RAD makes heavy use of
prototyping.
In Rapid Application Development, structured techniques and
prototyping are especially used to define users
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requirements and to design the final system. The development
process starts with the development of preliminary datamodels and
business process models using structured techniques. In the next
stage, requirements are verified usingprototyping, eventually to
refine the data and process models. These stages are repeated
iteratively.
RATIONAL UNIFIED PROCESS (RUP)
The Rational Unified Process is a framework intended to be
customized by software development teams, for theirindividual
needs. It was created by Rational Software (which is now part of
IBM).
RUP emphasises six best practices for modern software
engineering:
1. Develop iteratively, with risk as the primary iteration
driver2. Manage requirements3. Employ a component-based
architecture4. Model software visually5. Continuously verify
quality6. Control changes
Rational Unified Processing
SPIRAL SOFTWARE DEVELOPMENT
The Spiral Model is an iterative model that attempts to combine
advantages of the top-down and bottom-up models ofsoftware
design.
Spiral Software Development
The system requirements are defined in as much detail as
possible. This usually involves interviewing a number ofusers
representing all the external or internal users and other aspects
of the existing system.
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A preliminary design is created for the new system. This phase
is the most important part of the Spiral Model.
A first prototype of the new system is constructed from the
preliminary design.
A second prototype is evolved by a fourfold procedure:
1. evaluating the first prototype in terms of its strengths,
weaknesses, and risks;2. defining the requirements of the second
prototype;3. planning and designing the second prototype;
4. constructing and testing the second prototype.
WATERFALL SOFTWARE DEVELOPMENT
Waterfall Software Development
The waterfall model is a sequential design process comprised of
the following steps, each of which must becompleted before the next
starts:
1. Design2. Construction/implementation3. Integration
4. Testing/debugging/validation)5. Installation6.
Maintenance
XP
Extreme Programming
Extreme Programming (XP) is intended to improve software quality
and responsiveness to changing customerrequirements. by advocating
frequent releases in short development cycles, which is intended to
improve
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pro uct v ty an ntro uce c ec po nts w ere new customer requ
rements can e a opte . eatures are not a euntil they are actually
needed. Extreme Programming also encourages programming in pairs,
along with frequentcommunication between members of the development
team, and between the developers and clients.
Lean
Lean development could be summarized by seven principles, very
close in concept to lean manufacturing principles.
Everything not adding value to the customer is considered to be
waste, including:
unnecessary code and functionalitydelay in the software
development processunclear requirementsbureaucracyslow internal
communication
In order to be able to eliminate waste, one should be able to
recognize and see it. If some activity could be bypassedor the
result could be achieved without it, it is waste. Partially done
coding eventually abandoned during thedevelopment process is waste.
Extra processes and features not often used by customers are waste.
Waiting for otheractivities, teams, processes is waste. Defects and
lower quality are waste. Managerial overhead not producing
realvalue is waste.
Scrum
Scrum is an iterative methodology used in agile software
development.
During each sprint, typically a two to four week period (with
the length being decided by the team), the teamcreates a
potentially shippable product increment (for example, working and
tested software). The set of features thatgo into a sprint come
from the product backlog, which is a prioritized set of high level
requirements of work to bedone. Development is timeboxed such that
the sprint must end on time; if requirements are not completed for
anyreason they are left out and returned to the product backlog.
After a sprint is completed, the team demonstrates how touse the
software.
V-Model
V-Model
The V-model is a software development process which may be
considered an extension of the waterfall model.Instead of moving
down in a linear way, the process steps are bent upwards after the
coding phase, to form the typicalV shape. The V-Model demonstrates
the relationships between each phase of the development life cycle
and itsassociated phase of testing.
TDD
Test-driven development (TDD) is a software development process
that relies on the repetition of a very shortdevelopment cycle:
first the developer writes a failing automated test case that
defines a desired improvement or new
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Recommendthis on Google
unct on, t en pro uces co e to pass t at test an na y re actors
t e new co e to accepta e stan ar s.
PAY4BUGS
Pay4Bugs can be an essential part of your testing processes, no
matter which methodology you use.
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