The UNAT held that the UNDT was correct to find that there was clearly sufficient evidence to support the Administration鈥檚 conclusion that the staff member鈥檚 performance only partially met expectations, and that this concern was communicated to him. Although the Rebuttal Board鈥檚 confirmation of the rating, and the preparation of a second short-term performance appraisal occurred after the non-renewal was taken, the UNAT concluded that these reviews nonetheless confirmed that management鈥檚 prior informal evaluation of the staff member鈥檚 performance was not arbitrary but was instead well-based...