As the TAE, you are working with the organisation's Test Manager to decide which external...

 The best internal metric to measure the quality of the Test Automation System (TAS) and the number of problems associated with it would be the defect density within the TAS automation code. This metric provides insight into the robustness and reliability of the automation code itself. A lower defect density indicates higher quality and fewer problems, while a higher defect density may signal the need for improvements in the automation code. This metric is internal because it pertains directly to the quality of the TAS rather than its impact on external processes. References = The ISTQB Test Automation Engineer syllabus and other ISTQB materials emphasize the importance of internal metrics such as defect density to assess the quality and effectiveness of the TAS123.