Solution

Solution

Functional requirements define the specific behaviors, functions, and tasks that a system must perform. They describe what the system should do, including user interactions, system services, and business rules. For example, in a Library Management System, functional requirements include user registration, book borrowing, and inventory management.

Non-functional requirements, on the other hand, define the quality attributes, performance criteria, and constraints of the system. They describe how the system should perform its functions. These include aspects such as performance (response time, throughput), reliability (uptime, availability), security (encryption, authentication), usability, and scalability. For example, a non-functional requirement might specify that the system should handle $1000$ simultaneous users or be available $99.9\%$ of the time.