Explanation
Independence in testing is the degree of separation between the person who tests something and the person who developed it. Independence can help to reduce bias, increase objectivity, and provide different viewpoints. However, independence also has some drawbacks, such as increased communication overhead, reduced collaboration, and delayed feedback. In agile projects, testers are usually embedded in the agile teams to perform many of the testing tasks, such as unit testing, integration testing, acceptance testing, etc. This provides a high level of collaboration and fast feedback, but also reduces the independence of the testers.
Testers from an independent test team who do not get involved with the agile team, but are assigned to do System Testing once all sprints are completed, would provide the most independence for testers working with agile teams. However, this would also introduce many disadvantages, such as lack of alignment with the agile principles, loss of context and domain knowledge, delayed defect detection and resolution, and increased risk of missing customer expectations. References: ISTQB Foundation Level Agile Tester Syllabus, Section
1.1.2, page 8; ASTQB Agile Tester Certification Resources, Section 1.1.2, page 8.