A software requirements
specification (SRS) is a description of a software system to
be developed, laying
out functional and non-functional
requirements, and may include a set of use cases that describe
interactions the
users will have with the
software.
Software requirements specification establishes the basis for an
agreement between customers and contractors or
suppliers (in market-driven
projects, these roles may be played by the marketing and development divisions)
on what
the software product is to do
as well as what it is not expected to do. Software requirements specification
permits a
rigorous assessment of
requirements before design can begin and reduces later redesign. It should also
provide a
realistic basis for estimating
product costs, risks, and schedules.
The software requirements specification document enlists enough
and necessary requirements that are required for
the project development. To
derive the requirements we need to have clear and thorough understanding of the
products to be developed or
being developed. This is achieved and refined with detailed and continuous
communications with the project
team and customer till the completion of the software.
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