It is a false statement that performance evaluation systems focus on short-term rather than the long-term.
Performance appraisals refers to the appraisals that purpose of evaluating an individual's work performance and can encompass a wide range of goals and time-frames.
Although some performance appraisals emphasize long-term development and improvement, others may place greater importance on short-term accomplishments and meeting immediate objectives.
The specific focus of a performance appraisal depends on the organization's goals, the nature of the job and the performance evaluation framework in place.