Software requirements specification

For broader coverage of this topic, see Software requirements.
IEEE software life cycle

A software requirements specification (SRS) is a description of a software system to be developed. It is modeled after the business requirements specification (CONOPS). The software requirements specification lays out functional and non-functional requirements, and it may include a set of use cases that describe user interactions that the software must provide to the user for perfect interaction.

Software requirements specifications establish the basis for an agreement between customers and contractors or suppliers on how the software product should function (in a market-driven project, these roles may be played by the marketing and development divisions). Software requirements specification is a rigorous assessment of requirements before the more specific system design stages, and its goal is to reduce later redesign. It should also provide a realistic basis for estimating product costs, risks, and schedules.[1] Used appropriately, software requirements specifications can help prevent software project failure.[2]

The software requirements specification document lists sufficient and necessary requirements for the project development.[3] To derive the requirements, the developer needs to have a clear and thorough understanding of the products under development. This is achieved through detailed and continuous communications with the project team and customer throughout the software development process.

The SRS may be one of a contract's deliverable data item descriptions[4] or have other forms of organizationally-mandated content.

Typically a SRS is written by a technical writer, a systems architect, or a software programmer.[5]

  1. ^ Bourque, P.; Fairley, R.E. (2014). "Guide to the Software Engineering Body of Knowledge (SWEBOK)". IEEE Computer Society. Archived from the original on 28 December 2014. Retrieved 17 July 2014.
  2. ^ "Software requirements specification helps to protect IT projects from failure". Retrieved 19 December 2016.
  3. ^ Pressman, Roger (2010). Software Engineering: A Practitioner's Approach. Boston: McGraw Hill. p. 123. ISBN 9780073375977.
  4. ^ "DI-IPSC-81433A, DATA ITEM DESCRIPTION SOFTWARE REQUIREMENTS SPECIFICATION (SRS)". everyspec.com. 1999-12-15. Retrieved 2013-04-04.
  5. ^ Donn Le Vie, Jr. "Writing Software Requirements Specifications (SRS)". 2010.