Which type of requirement describes what functions the end product must accommodate?

• A. Functional
• B. Performance
• C. Operational
• D. Technical

Answer: (A)

Functional requirements describe the functions the end product must accommodate. They specify the actions, tasks, and capabilities the system or facility must be able to perform for users, focusing on what the product should do rather than how it will be done. This is why they best capture the needed functions of the end product—for example, the ability to support a given workflow, provide specific spaces or features, or allow certain user interactions.

Performance requirements, on the other hand, set measurable criteria for how well those functions are performed (like speed, capacity, or reliability). Operational requirements deal with how the product will be used in daily operations, including maintenance and environmental factors. Technical requirements focus on the standards and constraints related to technology, interfaces, and compatibility.