A Software Requirements Specification (SRS) is a comprehensive document created during the requirements analysis phase of the software development life cycle.
Its primary purpose is to formally describe what the software will do and how it will be expected to perform.
This includes:
1. Functional Requirements: What the system should do (e.g., The system shall allow users to register for an account.).
2. Non-Functional Requirements: The qualities of the system, such as performance, security, reliability, and usability (e.g., The system response time must be less than 2 seconds.).
3. Constraints: Any limitations on the system or its development process.
The SRS serves as an agreement between the development team and the stakeholders (clients, users) and forms the basis for design, implementation, and testing.