A method executed by a computer, the method includes: loading in-distribution inspection data stored in at least one memory; inputting the loaded in-distribution inspection data into at least one artificial intelligence model, and obtaining process-based noisy inspection data by noising the in-distribution inspection data up to a specific time-step; obtaining a semantic mask which is a mask specifying a semantic element for the in-distribution inspection data, and a nuisance mask which is a mask specifying a nuisance element for the in-distribution inspection data, from the noisy inspection data; generating out-of-distribution inspection data by applying selective data processing guidance configured to preserve the nuisance element and modify the semantic element based on the semantic mask and the nuisance mask; and outputting the out-of-distribution inspection data through at least one interface.