DEMATEL方法（决策试验与试验评估法）是一种运用图论与矩阵工具进行系统因素分析的方法。但此方法对系统因素间关系的评价仅限于实数域内，往往不适合描述现实生活中系统因素间复杂的影响关系。鉴于区间数能更有效地描述复杂的现象，本文将传统的DEMATEL方法拓展到了区间数领域，来弥补DEMATEL方法的这一不足。为此，本文建立了区间数初始直接影响矩阵，借助于区间数的运算法则和可能度排序，计算出区间数综合影响矩阵，并对系统因素进行分析，从而，提出区间数DEMATEL方法。然后采用区间数DEMATEL方法识别IT外包中知识转移影响因素，得到IT外包中知识转移过程中的原因影响因素、结果影响因素以及每个影响因素的重要程度，以此为IT外包人员给予相应的建议，同时也验证了该方法的实效性。%DEMATEL method ( Decision Making Trial and Evaluation Laboratory ) is a method for system factor analysis using graph theory and matrix tools .But the evaluation of the relationship between the system factors of this method is only limited to the real number field , not suitable for describing the complicated relationship between system factors in real life .Since interval number can more effectively describe the complex phenome-non, the traditional DEMATEL method is extended to interval number field ,making up for the shortcoming of DEMATEL method.First, this paper establishes the initial interval number direct influential matrix and then calculates comprehensive interval number influential matrix by arithmetic rules and possibility sequence of the interval number for analyzing the system factors , thus the interval DEMATEL method is put forward .Then this paper uses the interval DEMATEL method for identifying IT outsourcing influential factors , to find IT outsourcing reason influential factors、result influential factors and the important degrees of each influential factors .Based on this,corresponding suggestions for IT outsourcing personnel are given ,and at the same time the effectiveness of the method is verified .
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