Respuesta :
Functional requirements, nonfunctional requirements, and derived requirements security requirements are the different categories.
A function is defined by a functional requirement in software engineering and systems engineering, where a function is defined as a definition of behavior's between inputs and outputs.
Functional requirements specify what a system is expected to do and can include computations, technical details, data processing and manipulation, among other functions.
Use cases, which are used to define all the ways the system uses the functional requirements, are known as behavioral requirements. Non-functional requirements (sometimes referred to as "quality requirements") support functional requirements by placing restrictions on the design or execution (such as performance requirements, security, or reliability). Functional requirements are typically expressed as "system must do," whereas non-functional needs are articulated as "system shall be."
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