关键词: 灵敏度分析, 多属性决策, 加权模型（WPM）, 地磁图适配性

Abstract: The weight sensitivity of each index about geomagnetic map suitability is studied. Firstly, the indexes of geomagnetic map are presented such as standard deviation, roughness, correlation coefficient, entropy and cumulative gradient, subsequently the data processing strategy about positive indexes and negative indexes are discussed combined with Weighted Product Model（WPM）, and then the change scope of weights is researched when maintains the order result unchanged and the smallest variation range of the weight of each index is deduced and further gets the weight sensitivity from the perspective of quantitative derivation. Lastly, a specific example is presented to solve the change scope of weights and the smallest variation range and sensitivity about the weight of each index, which provides a reference for decision makers.

Key words: sensitivity analysis, multiple attribute decision making, Weighted Product Model（WPM）, geomagnetic suitability