An automatic facility deactivation planning device comprises: a work process generating mechanism 151 to generate a work process involving a deactivation of an electric power system facility; and a reliability systemplanning mechanism 16 which plans a reliability system with respect to each section of the work process generated by the work process generating mechanism 151. 電力系統設備の停止を伴う作業の作業工程を発生させる作業工程発生機構151と、作業工程発生機構151により発生させた作業工程の各断面に対し、信頼度系統を立案する信頼度系統立案機構16を備えている。 - 特許庁