Let’s start with a reminder of the definition of software requirements according to IEEE & CMMI: A condition or capability needed by a user to solve a problem or achieve an objective,
Requirements must be verifiable: requirements cannot include abstract terms such as “good”, “excellent” or “efficient”. More quantitative and measurable terms must be used. Requirements must be verifiable under expertise and environment constraints. Non-functional requirements must have a quantitative value for them to be verifiable.
A requirement must be complete and precise, consistent, measurable, verifiable, prioritized and classified. Requirements must be neither ambiguous nor poorly defined, but rather complete and precise. They must translate the user’s needs in order to address his/her business needs, and still be understandable by all the stakeholders.
Software Requirements Specification is the type of documentation that you create once but use for years. From your first interactions to many future releases, you will constantly be coming back to the technical requirements document, and here’s why. SRS in software engineering creates the basis for all documentation.