functionaliteitsproblemen

Functionality is the range of capabilities that a product or system provides to perform its intended tasks. In software and product design, functionality describes what the product does, not how well it does it. It is typically distinguished from non-functional requirements such as performance, reliability, security, and usability, which define quality attributes rather than tasks.

Functional requirements specify concrete tasks and operations, for example, a word processor's ability to create a new document, save changes, print, or import data. In web services, functionality might include user authentication, data retrieval, and API interactions.

Functionality is defined during requirements engineering and verified through functional tests and user acceptance testing. It is shaped by stakeholder goals, user tasks, and constraints; scope growth without care leads to feature creep, risking misalignment and increased cost. Teams prioritize core functionality for early releases and plan enhancements to avoid overload.

In practice, functionality is validated through use-case coverage and acceptance criteria, and delivered as part of a minimum viable product or a staged release, with additional functionality added in future iterations.