What do non-functional requirements primarily address?

Non-functional requirements primarily focus on the qualities and attributes of a system rather than its specific behaviors or functions. These requirements define how well a system performs its functions, including aspects such as performance, scalability, security, usability, and reliability. They are essential for ensuring that the system meets the expectations of users and stakeholders regarding its overall operational characteristics.

By emphasizing the "how" of system performance, non-functional requirements play a critical role in shaping the user experience and the system's capacity to handle various conditions and workloads. For instance, a system may need to respond to user requests within a specific timeframe, handle a certain number of concurrent users, or maintain functionality during peak loads.

Options that present different perspectives, such as what the system should do or how to write code, do not align with the core focus of non-functional requirements. While functional requirements define specific features and functionalities, non-functional requirements complement these by addressing the quality aspects necessary for the system's success.