Requirements Document (Software Requirements Specifications)

Requirements document or also know as Software Requirements Specification is official statement of the system requirements for end users, software developers, project managers and customers.

It is written using natural language which is easily understood by all readers. It should describe the following.

1. The purpose of the software.
2. Standard conventions used in the requirements document.
3. Intended user and their level of technical competencies
4. Project scope, it's goal; and objectives.
5. Overall description to the software.
6. Brief description of the software features.
7. It's intended operating environments
8. Design and system constraints under which the system must operate.
9. User documentations that should be delivered with the project.
10. Functional requirements of the software.
11. Non functional requirements such as performance, safety, security and reliability requirements.
12. And other external interface requirements such as software requirements, hardware requirements and communication requirements.

To support the requirements document you could use use case diagrams and sequence diagrams to have higher level of details.

Please click here, to get requirements document template.