Ensuring Quality: To ensure the quality of the consulting engagement in the human resources department, the chief audit executive (CAE) can implement a fieldwork peer review process. This involves having experienced auditors review the work of their colleagues to ensure adherence to audit standards and procedures.

Efficiency and Effectiveness:

Peer Review: This method helps identify any issues or improvements needed in real-time, enhancing both the efficiency and effectiveness of the audit process.

Standardized Work Programs: While standardized work programs (option C) provide consistency, peer review adds a layer of quality assurance.

Supervision: Personal supervision by the CAE (option D) is not practical for ensuring the quality of all engagements.