灵敏度分析

评价中灵敏度 　 可以用来确定评价条件发生变化时备选方案的价值是否会发生变化或变化多少。例如，在利用评价进行评价时，需要确定每一个分目标的权重系数和各分目标的评分数。这中间或多或少地会存在当事人的主观意识，不同的人可能会有截然不同的价值观念。因此就必须考虑当分配的权重系数或评分数在某一个范围内变化时，评价的结果将会产生怎样的变化。 指标权重灵敏度分析 Sensitivity analysis Can be used to determine whether the value of the options will change or little change in the evaluation conditions change. For example, in the use of evaluation forms to evaluate the need to determine the weight of each objective of the sub-weight coefficients and score a few goals. This is the middle there will be more or less subjective consciousness of the parties, different people may have different values. Therefore it must be considered when assigning a weight factor or Rating change within a particular range, the results of the evaluation will produce what changes. Sensitivity analysis of the index weight 指标权重的灵敏度分析应用较广,与指标值灵敏度分析不同的是,权重之和必须为1,一个指标权重的增加必然会导致其他指标权重的减少。指标的权重为,若该权重增加,则新权重为,为了保证权重之和为1,本文采取在其他个指标中平均缩减的方式,因此权重调整后的评价值为: Sensitivity analysis of the index weight broader application, and the index value sensitivity analysis is different, heavy rights and must be 1, an indicator will inevitably lead to an increase in the weight of the weight reduction of other indicators. The weight of is . If the weight increase by , the new weight is . In order to make sure the sum of weight is 1, we reduce of other indicators. So the adjusted weight of is defined in formula (xxxxx). 首先设一个的初始值,然后根据一定的步长逐步增加,每次都进行新的评价和排序,并且和原始数据评价排序对比,直到排序不一致为止,从而得到使排序不变的权重容许改变值,当然权重改变也包括增加和减少,要分别进行计算。 Setting a first initial value of , and then gradually increased according to a certain step, for each new evaluation and sorting, sorting and comparison of the original data evaluation, up until the sorting is inconsistent, resulting in that the weight of the same order to allow the changing value , the weight change of course also increase and decrease, respectively, to be calculated. 对于个组合指标权重同时变化的情形,初始值可以设定为/k,其他指标权重的初始值为-;组合指标步长为Δσ/ｋ,其他指标步长为,从而保证权重之和为1。当然,也要考虑到权重增加和减少的情形。 For the case of combinations while the index weight change, the initial value can be set as , and the initial values of other indicators can be set as . The step length of combine indicator is , and the step length of other indicators is . This can make sure the sum of weights is 1.