This document discusses dealing with problems that can arise in performance appraisals. It outlines several potential issues with rating scales, including unclear standards, leniency/strictness of raters, halo effects, and central tendency. It recommends getting agreement on an appraisal plan, using the right assessment tool, and keeping a performance diary to address these problems. The document also provides advantages and disadvantages of different appraisal tools, such as rating scales, behavioral anchored rating scales, and critical incident reports.