Which of the following is the BEST measure of the effectiveness of an employee deprovisioning...

 The effectiveness of an employee deprovisioning process can be measured by the number of days taken to remove access after staff separation dates, as this indicates how quickly and completely the organisation can revoke the privileges of former employees and reduce the risk of unauthorized access or data leakage. The number of days taken for IT to remove access after receipt of HR instructions is a measure of the efficiency of the IT department, but not the overall process. The number of termination requests processed per reporting period is a measure of the volume of the process, but not the quality or timeliness. The number of days taken for HR to provide instructions to IT after staff separation dates is a measure of the performance of the HR department, but not the entire process. References = Risk and Information Systems Control Study Manual, Chapter 4: Risk Response, page 152.