公开(公告)号：US20200034724A1

公开(公告)日：2020-01-30

申请号：US16513759

申请日：2019-07-17

Applicant: Hitachi, Ltd.

Inventor： Wakana TAKESHITA ,  Takuro MORI

IPC: G06N5/04 ,  G06N5/02 ,  G06F16/901 ,  G06F16/906 ,  G06Q10/06

Abstract: A risk analysis support device that performs risk analysis with a short analysis time includes: a control structure diagram input unit which receives an input of a risk analysis target represented in a form of a control structure diagram that represents the risk analysis target by a block and a control showing a relationship between a block executing control and a passive block controlled by the block. A control loop search is performed in a database for a similar control structure diagram including a subset of controls that matches or is similar to a subset of controls extracted from the control structure diagram input by the input unit and acquires from the database a hazard scenario including a node having a correspondence relationship with a subset of controls included in the similar control structure diagram. A recommendation output unit outputs the acquired hazard scenario in a tree structure.