利用金属材料室温拉伸试验能力验证结果的中位值作为初始稳健平均值，用其稳健标准偏差对其进行修正得到修正后的稳健平均值及稳健标准偏差，以此方法反复修正直至稳定，得到能力验证结果的指定值，最后再根据稳定后的稳健标准偏差计算指定值的不确定度。结果表明: 对该次拉伸试验结果进行二次修正后，其稳健平均值及稳健标准偏差均已稳定，分别为799和6.23 N·mm-2; 因此该次金属材料室温拉伸试验能力验证结果的指定值为799 N·mm-2; 该指定值的标准不确定度为0.7 N·mm-2。

The original robust average was calculated from the test results of room temperature tensile test for metallic materials and its robust standard deviation was used for correction. Then corrected robust average and robust standard deviation was calculated. The iterative correction stopped until the robust average and robust standard deviation were stabilized. The assigned value of this proficiency testing results was obtained and its uncertainty was calculated from the final robust standard deviation. The results show that the robust average and robust standard deviation of this tensile test results were stabilized after two iterations, which were 799 N·mm-2 and 6.23 N·mm-2 respectively. So the assigned value of this proficiency testing results was 799 N·mm-2 and its standard uncertainty was 0.7 N·mm-2.