
A software requirements specification, or SRS, describes what a software system must do and the conditions it must satisfy. It gives product leaders, users, engineers, testers, and approvers a shared reference for scope. A useful SRS covers functional requirements, non-functional requirements, interfaces, constraints, assumptions, dependencies, acceptance criteria, and the evidence needed to verify each requirement.
The document may begin as a baseline for a sequential project or evolve alongside an iterative product backlog. Either way, it should remain clear, testable, traceable, and controlled. The ISO/IEC/IEEE 29148 requirements engineering standard provides a useful reference point, while the practical structure still needs to match the project’s risk, stakeholders, and delivery model.
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