Software development is
the process of programming, testing, debugging and maintaining an application
that results in software product. Software development is step by step method.
Different methodologies are used for the development of software e.g. AJAX and
Waterfall approach.
Software is developed for
variety of purposes but the main purposes of software development are to meet
specific need of a user’s.
Software Development Methodology
There are variety of
software development approaches are being used by developers but each of the
methodology has its own strengths and weaknesses. Software development methodology is a structured
and well-engineered process. Most methodologies share the combine stages that
are
·
Requirement Analysis
·
Planning
·
Designing
·
Coding
·
Testing
·
Deployment and Maintenance
·
Requirement Analysis Phase
Requirement analysis is
the phase in which requirement engineers determines the needs or requirement
for the development of new or altered product. Different requirements of
different stakeholders can conflict with each other. But it is a task of an
requirement engineer to analyse, document, validate and manage the software
requirements.
Requirements can be of
different types:
·
·
Architectural Requirements
·
Structural Requirements
·
Behavioural Requirements
·
Functional Requirements
·
Non-functional Requirements
·
Core Functionality and Ancillary
Functionality Requirements
·
Performance Requirements
·
Design Requirements
·
Derived Requirements
·
Allocated Requirements
Planning
Phase
During planning phase you
decide what you want to do, what is the problem and what is its solution. In
planning phase we define the scope of our project or product. The basic
activities that are involved in planning phase are:
- Define the problem, propose its solution
and identify the resources and capital required.
- Generate alternative solutions.
- Picking up a good development strategy
that helps your product beat your competitor’s product.
Design
Phase
Once the requirements
have been gathered and resources and other capitals are defined. The next step
is to produce the initial design of your product.
It is also called logical
designing. In design phase we design the system architecture that helps has
evaluate the software and hardware requirements also. Design development can be
done in variety of ways some of which are Data Flow Diagrams, UML schemas,
Prototyping and Diagramming.
Coding
Phase
Coding of design is done
in a computer language. In coding phase, all the code is written and then run
on computer. If Hardware is required, hardware configuration is done. The
product or project is prepared to run in an operational or user environment.
Testing
Phase
Different components of
the system are integrate together and then testing is applied on individual
components and subcomponents. A component is tested by giving different inputs
and the resulted outputs are then recorded in order to deduce results. Testing
have different types, some of them are Black box testing, White Box testing,
Integration testing and Load testing.
Deployment
and maintenance
After the successful testing
product is then delivered to the customer for their use. Deployment usually Includes
Customization and Installation. Maintenance is the process of checking product’s
faults and drawbacks and improve it for the future use. Maintenance is the process
of evaluating System’s performance.
