Abnormality diagnosis apparatus, abnormality diagnosis method, and storage medium

An abnormality diagnosis method, comprising:

• acquiring time series data that contains at least one selected from the group consisting of an electric current value and a voltage value at the time of first welding;
• determining, with use of an abnormality determination model and based on the time series data which has been acquired, whether or not there is an abnormality in a welded part at the time of the first welding, the abnormality determination model having learned a relation between (i) time series data containing at least one selected from the group consisting of an electric current value and a voltage value at the time of second welding and (ii) presence or absence of an abnormality in a welded part;
• and
• in a case where it has been determined that there is an abnormality, outputting a result of the determination and at least one selected from the group consisting of a factor of the abnormality and a remedial method for solving the abnormality.

A non-transitory storage medium storing a program for causing a computer to carry out:

• an acquisition process of acquiring time series data that contains at least one selected from the group consisting of an electric current value and a voltage value at the time of first welding;
• an abnormality determination process of determining, with use of an abnormality determination model and based on the time series data which has been acquired in the acquisition process, whether or not there is an abnormality in a welded part at the time of the first welding, the abnormality determination model having learned a relation between (i) time series data containing at least one selected from the group consisting of an electric current value and a voltage value at the time of second welding and (ii) presence or absence of an abnormality in a welded part;
• and
• an output process of, in a case where it has been determined in the abnormality determination process that there is an abnormality, outputting a result of the determination and at least one selected from the group consisting of a factor of the abnormality and a remedial method for solving the abnormality.