Example of the SPM fit and refitting process for SN 2022jpx. The left panel shows the initial SPM fit, with outliers identified and enclosed by open blue squares in the top plot. The bottom plot displays the residuals associated with the SPM fit (r^SPM), with dashed lines indicating the ±3σ_r thresholds used for outlier identification. From the left panel to the right, we illustrate the iterative SPM fitting process, where outliers are removed in each iteration until no outliers are detected. In this case, no outliers remain after the fifth iteration. The χ_d.o.f.² value is reported in each panel for every iteration.