What does 'cross-functional' imply in a Scrum Team?

In a Scrum Team, the term 'cross-functional' signifies that team members collectively possess all the skills necessary to complete the project. This means that each member contributes a unique skill set but also has the flexibility to collaborate and support other areas of expertise within the team. The essence of being cross-functional is that the team can efficiently solve problems and adapt to changing requirements without relying heavily on external resources or specialists. This dynamic encourages teamwork, fosters innovation, and enables the team to deliver value continuously throughout the development process.

The other options do not align with the concept of cross-functionality. Working in isolation contradicts the collaborative nature of Scrum, while specific roles with fixed responsibilities imply a lack of versatility that goes against the agile principles. Additionally, the idea of team members being interchangeable suggests a loss of individual skill and specialization, which opposes the intent of creating a well-rounded, competent team capable of self-managing and completing varying tasks.