software application development.

Following are the phases of software application development.
Requirements analysis
Gathering the customer’s requirements and figuring out the appropriate way to
proceed with each item. This phase usually produces a formal requirements docu-
ment aimed at freezing all of the requirements so that the design phase may begin.
Design
Designing the software based on the requirements document. Programmers lay
out classes and their members and methods, and might create UML diagrams for
documentation. This phase produces a formal design document that the devel-
opers will use as a reference when they implement the design.
Implementation
The actual coding of the software. What is produced here is a working ver-
sion of the software, maybe along with a user manual or some other software
documentation.
Testing
Putting the software through a validation and verification process against the
requirements document produced in the requirements analysis phase.
Release
Packaging the software in a manner suitable for distribution to the public.
Maintenance
Fixing any new bugs that may be discovered once the software has been
released, and producing patches.
Upgrade
Identifying a need for the software to be enhanced or upgraded in some manner.
At this point, the life cycle process starts over.