Software Requirements Specifications (SRS) is a description of a software system to be developed. It lays out functional and non-functional requirements and may include a set of use cases that describe user interactions that the software must provide.
Many projects fail because the system is implemented before the team fully understands what the customer wants. It is for this reason that it is important to learn what goes into requirement analysis and specifications.
Goals of Software Requirements Specifications
- To fully understand the customer requirements
- Remove inconsistency and ambiguity from the requirement
- Document the requirements properly
How to write an SRS
Every piece of software requires a good SRS if it is going to succeed, but it takes a lot of practice to write those specifications and it isn’t easy. When briefing a software development team, keep the following in mind:
- Include as much detail as possible. You can’t have too much detail. While unnecessary details will waste a bit of space in a digital document, forgetting something can result in a large, expensive mess. Don’t hold back.
- Assume the reader, i.e. the developer, knows nothing. Explain everything, regardless of how rudimentary or obvious it seems.
- Don’t try to be concise; use lots of words.
Writing SRS is a brainstorming process. It needs to contain a complete description of the behaviour of a system that is to be developed. The use cases describe all the interactions the users will have with the system. These requirements reflect the needs of the client and the users.
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