functional and NonFunctional , Functional requirements refer to the specific tasks or functions that a software system must perform to satisfy the needs of the users. These requirements outline the system’s behavior, the actions it should execute, and the responses it should produce. Functional requirements can include features, capabilities, and interactions with users or other systems.
Examples of functional requirements:
1. The system should allow users to create an account and log in.
2. The system should generate monthly invoices for customers.
3. The system should provide a search functionality to allow users to find specific products.
On the other hand, non-functional requirements define the qualities or properties that a software system should possess, which are not directly related to its specific functions. These requirements typically focus on aspects such as performance, reliability, security, usability, maintainability, and scalability.
Examples of non-functional requirements:
1. The system should respond to user actions within 2 seconds.
2. The system should be able to handle 100 concurrent users without performance degradation.
3. The system should protect user data with encryption and secure authentication mechanisms.
It is important to consider both functional and non-functional requirements when designing and developing a software system, as they collectively define the desired behavior and characteristics of the system.
