NFR (Non-Functional Requirements)

Non-Functional Requirements (NFRs) specify how a system should perform, rather than what it does. They encompass characteristics like speed, security, reliability, usability, and scalability. For example, an online banking system must process transactions quickly, keep user data secure, and be available 99.9% of the time. NFRs define the quality attributes and constraints that ensure the system meets users' expectations and operates effectively under various conditions. They are essential for creating software that is not just functional but also dependable and user-friendly.