Software Requirements Specification

A Software Requirements Specification ('SRS) – a requirements specification for a software system – is a complete description of the behavior of a system to be developed. It includes a set of use cases that describe all the interactions the users will have with the software. In addition to use cases, the SRS also contains non-functional requirements. Non-functional requirements are requirements which impose constraints on the design or implementation (such as performance engineering requirements, quality standards, or design constraints).

Software Requirements is a sub-field of Software engineering that deals with the elicitation, analysis, specification, and validation of requirements for software.^[1]

The software requirement specification (SRS) document enlists all necessary requirements for project development. To derive the requirements we need to have clear and thorough understanding of the products to be developed. This is prepared after detailed communications with project team and the customer. A general organization of an SRS is as follows ^[2]

• Introduction
  • Purpose
  • Scope
  • Definitions
  • System Overview
  • References
• Overall Description
  • Product Perspective
  • Product Functions
  • User Characteristics
  • Constraints, Assumptions and Dependencies
• Specific Requirements
  • External interfaces
  • Functions
  • Performance requirements
  • Logical database requirement
  • Design constraints
  • Key features

See also

• Functional specification
• Product design specification
• Requirements analysis
• System Requirements Specification
• Software development process
• Specification (technical standard)
• Specification and Description Language
• System requirements
• Verification and Validation (software)

References

External links

• IEEE Recommended Practice for Software Requirements Specifications (IEEE Std 830-1998, Revision of IEEE Std 830-1993)
• Leffingwell, Dean; Don Widrig (2003). Managing Software Requirements: A Use Case Approach (2nd ed. ed.). Addison-Wesley. ISBN 032112247X. 
• Gottesdiener, Ellen (2009). The Software Requirements Memory Jogger: A Desktop Guide to Help Business and Technical Teams Develop and Manage Requirements. Addison-Wesley. ISBN 157681114X.