A company has decided to execute performance appraisals for their help desk workers. The employees are self-managed and have low customer service ratings. Which performance improvement tool would work for this group?

Subordinate-appraisal involves employees evaluating the performance of their supervisors. This method is not applicable in this scenario, as the employees in question are self-managed and do not have traditional supervisors. Therefore, this approach would not effectively address the performance issues of the help desk workers.

Peer-appraisal allows employees to assess the performance of their colleagues. While this can provide valuable feedback, it may not be the most effective tool for self-managed workers with low customer service ratings, as peer evaluations might not foster the same level of personal accountability and self-reflection as self-appraisals.

Supervisor-appraisal entails an evaluation conducted by a manager or supervisor. In this case, since the employees are self-managed, there may not be a supervisory figure available to provide meaningful feedback. This method would likely fail to engage the employees effectively in their own performance improvement.