The comments and suggestions prompted by K. R. Murphy’s (2008) description of alternate models of the relationship between job performance and ratings of job performance reflect 3 broad themes: (a) the relationship between performance appraisal and performance measurement, (b) the best psychometric models for understanding performance ratings, and (c) the appropriateness of static measures for dynamic phenomena. This paper comments on these 3 themes and suggests directions for future research and practice in performance appraisal that focuses on rater goals, organizational interventions to improve the accuracy and value of ratings, and assessments of the value of performance ratings as criteria.