FAILURE DIAGNOSIS DEVICE, FAILURE DIAGNOSIS METHOD, AND FAILURE DIAGNOSIS PROGRAM

To provide a failure diagnosis device capable of streamlining confirmation work by distinguishing defects that are easy to confirm from defects that are difficult or impossible to confirm when presenting candidates for the cause of failure or items to be confirmed in order to identify the cause of failure.SOLUTION: A failure diagnosis device 1 capable of estimating the cause of failure from an accident report based on text data includes: defect information extraction means 7 for extracting defect information from the text data; causal relationship extraction means 8 for identifying causal relationship between the defect information; failure cause estimation means 11 for estimating a defect event that corresponds to the cause of the input defect event based on the causal relationship; confirmation easiness degree estimation means 10 for estimating a confirmation easiness degree indicating the easiness of confirmation whether or not the defect event estimated thereby actually occurs; and narrowing-down condition presentation means 12 for presenting the failure cause related to the estimated defect event as a narrowing-down condition.SELECTED DRAWING: Figure 1 【課題】故障原因の候補、あるいは故障原因を特定するために確認すべき項目を提示する際、確認が困難な不具合と、確認が困難、あるいは不可能である不具合と、を区別することで、確認作業を効率化できる故障診断装置を提供する。【解決手段】テキストデータによる事故報告書から故障原因を推定することが可能な故障診断装置１であって、テキストデータから不具合情報を抽出する不具合情報抽出手段７と、不具合情報間の因果関係を特定する因果関係抽出手段８と、因果関係に基づいて、入力された不具合事象の原因にあたる不具合事象を推定する故障原因推定手段１１と、それにより推定された不具合事象が、実際に発生しているかどうかの確認の容易さの程度を示す確認容易度を推定する確認容易度推定手段１０と、推定された前記不具合事象に係る故障原因を絞り込み条件として提示する絞り込み条件提示手段１２と、を備える。【選択図】図１