hyötyvaatimuksista

Hyötyvaatimukset, known in English as functional requirements, describe what a system should do. They define the behaviors, functions, and information that the system must provide to its users or other systems. These requirements focus on the intended functionality and are crucial for defining the scope and purpose of a software product or system.

Functional requirements are typically stated in terms of inputs, processing, and outputs. For example, a functional requirement for an e-commerce website might be: "The system shall allow users to add items to a shopping cart." This specifies a particular function the system must perform. Other examples include user authentication, data validation, generating reports, and performing calculations.

The clarity and completeness of functional requirements are vital for successful software development. They serve as the foundation for design, implementation, and testing. Without well-defined functional requirements, developers may build a system that does not meet the users' needs, leading to costly rework and dissatisfaction. They are often documented in requirements specifications or user stories.

In contrast to non-functional requirements, which define how a system performs (e.g., speed, security, usability), functional requirements focus solely on the "what" – the specific actions and capabilities the system must possess. Both types of requirements are essential for a comprehensive understanding of system needs.