Abnormal irregularity cause identifying device, abnormal irregularity cause identifying method, and abnormal irregularity cause identifying program

An abnormal irregularity cause identifying method executed by a computer, the method comprising:

• reading, from a storage device storing pieces of process data continuously output by a plurality of sensors included in a production facility, the pieces of process data, the production facility performing a batch stage of sequentially processing a processing target per predetermined transaction and a continuous stage of continuously processing the processing target after the batch stage;
• associating a range of a complete timing of the batch stage with an output timing of process data of the pieces of process data in the continuous stage based on a residence time of the processing target in the production facility;
• calculating an abnormality degree representing an extent of an irregularity of the process data by using process data in the batch stage and process data in the continuous stage associated with each other;
• and
• determining, for each of the pieces of process data output by the corresponding one of the plurality of sensors, whether the abnormality degree that is calculated satisfies a predetermined criterion by using causal relation information defining a combination between a cause and the irregularity of the process data output by each of the plurality of sensors, the irregularity appearing as an influence resulting from the cause,
• wherein an action representing a handling to be taken for each cause for operating the production facility for suppressing abnormal irregularity is previously stored, and
• the production facility is controlled based on the stored action.

A non-transitory computer readable medium storing an abnormal irregularity cause identifying program causing a computer to perform:

• reading, from a storage device storing pieces of process data continuously output by a plurality of sensors included in a production facility, the pieces of process data, the production facility performing a batch stage of sequentially processing a processing target per predetermined transaction and a continuous stage of continuously processing the processing target after the batch stage;
• associating a range of a complete timing of the batch stage with an output timing of process data of the pieces of process data in the continuous stage based on a residence time of the processing target in the production facility;
• calculating an abnormality degree representing an extent of an irregularity of the process data by using process data in the batch stage and process data in the continuous stage associated with each other;
• and
• determining, for each of the pieces of process data output by the corresponding one of the plurality of sensors, whether the abnormality degree that is calculated satisfies a predetermined criterion by using causal relation information defining a combination between a cause and the irregularity of the process data output by each of the plurality of sensors, the irregularity appearing as an influence resulting from the cause,
• wherein an action representing a handling to be taken for each cause for operating the production facility for suppressing abnormal irregularity is previously stored, and
• the production facility is controlled based on the stored action.