A person analysis identifies employees who are not meeting performance requirements and why. Data can be collected through performance appraisals, self-ratings, cognitive and behavioral tests, assessment centers, and attitude measures. A performance appraisal involves a supervisor evaluating an employee's performance using a rating scale, while a self-rating involves an employee evaluating their own performance. Cognitive tests measure knowledge and skills like numeracy, verbal abilities, and reasoning. Behavioral tests evaluate skills in simulated work situations. Assessment centers provide standardized evaluations of behavior through multiple assessments like simulations and interviews. Attitude measures use scales to provide a valid measurement of an individual's attitudes. The analysis identifies any non-trainable needs due to issues like rewards/punishments or feedback,