Which groups of stakeholders are responsible for functional testing for products created in a project plan?

• A. Customers
• B. Team Members
• C. Managers
• D. Customers and Team Members

Answer: (D)

Functional testing checks that the product behaves the way the requirements specify from a user’s perspective. To do this effectively, you need input from both those who will use and define success for the product and those who built it and know how its features are supposed to work. Customers bring the real-world usage scenarios and acceptance criteria, ensuring the product delivers the expected value and meets user needs. Team members—developers, testers, and business analysts—execute test cases, verify that functions align with the plan, and catch defects you wouldn’t notice from a purely business viewpoint. Managers guide the project and review results, but the hands-on testing work is typically done by customers and the project team. That combination ensures both the functionality and the business objectives are validated, making it the best fit for functional testing.