10REQUIREMENTS DOCUMENTATION
Requirements state what the software must do in order to satisfy the customer’s needs, specifically:
- What functions the system must carry out (a functional requirement)
- How well the system must perform them (a nonfunctional requirement)
- The resource or design parameters in which the software must operate (constraints, which are also nonfunctional requirements)
If a piece of software does not fulfill a particular requirement, you cannot consider the software complete or correct. A set of software requirements, therefore, is the fundamental starting point for software development.
10.1 Requirement Origins and Traceability ...
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