SRS is the official statement of what the system developers should implement.
SRS is a complete description of the behavior of the system to be developed.
SRS should include both a definition of user requirements and a specification of the system requirements.
The SRS fully describes what the software will do and how it will be expected to perform.
What is the purpose of SRS
The SRS precisely defines the software product that will be built.
SRS used to know all the requirements for the software development and thus that will help in designing the software.
It provides feedback to the customer.
Characterstics of an SRS:
Correctness: The SRS accurately represents the requirements of the software system.
Completeness: The SRS includes all necessary functional and non-functional requirements.
Consistency: The SRS avoids conflicts or contradictions within the document.
Unambiguous: The SRS is clear and free from ambiguity or vagueness.
Verifiable: The requirements in the SRS are testable and measurable.
Modifiable: The SRS can accommodate changes and updates to requirements.
Traceable: The SRS establishes links between requirements and related artifacts.
Understandable: The SRS is written in language that is easily understood by all stakeholders.
Feasible: The requirements in the SRS are achievable within project constraints.
Stakeholder-focused: The SRS addresses the needs and expectations of stakeholders.
Components of an SRS:
Introduction: Provides an overview of the document, including its purpose, intended audience, and any references or related documents.
Scope: Defines the boundaries of the software system, specifying what functionalities and features are included and excluded.
Functional Requirements: Describes the specific functionalities and behavior of the software system, outlining the inputs, outputs, and actions expected from the system in response to different user interactions.
Non-functional Requirements: Specifies the qualities and characteristics of the software system, including performance, reliability, usability, security, and other constraints.
User Requirements: Outlines the needs and expectations of the users, describing their goals, tasks, and interactions with the software system.
System Requirements: Defines the technical requirements of the software system, including hardware, software, network dependencies, performance requirements, compatibility, and any external interfaces.
Use Cases: Provides detailed descriptions of typical user scenarios or interactions with the software system, including the sequence of actions and expected system behavior.
Data Requirements: Describes the data elements, structures, formats, and relationships that the software system will handle, including data inputs, outputs, storage, and processing requirements.
Assumptions and Constraints: States any assumptions made during the requirements gathering process and any constraints that may impact the design or implementation of the software system.
Risks and Dependencies: Identifies any potential risks or dependencies associated with the development, deployment, or operation of the software system.
Glossary: Includes a list of key terms, acronyms, and definitions used within the document to ensure a common understanding among stakeholders.