Estimation apparatus, estimation method, and non-transitory computer-readable medium

An estimation method that is executed by a computer, the estimation method comprising:

• by the computer,
• acquiring, as an abnormality index, an evaluation index which is output by an evaluation model according to state data being input when an abnormality occurs in a facility, among pieces of the state data indicating a state of the facility when an operation model is used to control a control target provided in the facility, the operation model being generated by reinforcement learning in which an output of the evaluation model trained by machine learning to output the evaluation index in accordance with the state of the facility, is set as at least a part of a reward, and outputting an action in accordance with the state of the facility;
• estimating which of the evaluation model or the operation model is a main cause of the abnormality, based on the abnormality index;
• and
• executing an output in accordance with a result of the estimating.

A non-transitory computer-readable medium having recorded thereon an estimation program that is executed by a computer and that causes the computer to function as:

• an abnormality index acquisition unit configured to acquire, as an abnormality index, an evaluation index which is output by an evaluation model according to state data being input when an abnormality occurs in a facility, among pieces of the state data indicating a state of the facility when an operation model is used to control a control target provided in the facility, the operation model being generated by reinforcement learning in which an output of the evaluation model trained by machine learning to output the evaluation index in accordance with the state of the facility, is set as at least a part of a reward, and outputting an action in accordance with the state of the facility;
• an estimation unit configured to estimate which of the evaluation model or the operation model is a main cause of the abnormality, based on the abnormality index;
• and
• an output unit configured to execute an output in accordance with a result of the estimate.