Abstract: For the object threat assessment，in which the attribute values and the preference information are in the form of interval numbers，a new method of interval number is proposed.After solving the multi-objective programming of minimizing the total deviation between the alternatives and ideal object，maximizing the total deviation between the alternatives and negative ideal object，and minimizing the maximum deviation between the subjective and objective preference，the weights of the attributes are determined.The priorities of object threat assessment are given by the possibility degree.The example analysis proves the feasibility and practicability of the method.

Key words: threat assessment, interval number, priority, possibility degree

摘要： 针对决策者偏好信息和决策矩阵元素均为区间数的目标威胁评估问题，提出了一种新的区间数方法。该方法通过求解各方案与理想方案偏差最小、与负理想方案偏差最大，同时主、客观偏好的最大偏差最小的多目标规划问题，确定属性的权重，根据可能度给出目标威胁的排序结果。实例分析表明了方法的有效性和实用性。

关键词: 威胁估计, 区间数, 排序, 可能度