In a cross-functional team, how should roles and responsibilities be defined to enhance testing efficiency?

In a cross-functional team, roles and responsibilities should be clearly defined, but collaboration among team members is crucial for testing efficiency. Assigning testing tasks only to dedicated testers may create silos and hinder collaboration. By clearly defining roles and encouraging collaboration, team members can leverage their diverse skills and work together to ensure comprehensive testing, leading to improved efficiency and effectiveness in the testing process.