What action must a rater take no later than October 31?

The correct choice emphasizes the necessity of establishing a Performance Rating Documentation File by October 31. This action is essential for ensuring that performance evaluations are systematically tracked and recorded. This documentation can be crucial for multiple aspects of personnel management, including performance assessments, promotions, and accountability.

The deadline of October 31 signifies a structured approach to performance management within the organization, ensuring that all ratings are formalized and available for review. By having this file in place, supervisors can contribute to a transparent and fair evaluation process.

Establishing this documentation file aligns with best practices in performance management, as it not only aids in tracking employee progress but also serves as a reference point for performance-related discussions throughout the year. Having this file well-established by the end of October allows for adequate preparation and reflections on employee performance prior to the end-of-year reviews that may occur in the following months.