Sensitivity of the non-parametric SFH in recovering rapid and recent variation of SFH. In both panels, the y-axis indicates the ratio between the estimated SFR obtained from the non-parametric SFH and the true one. The variation of this ratio is shown as a function of the age of the rapid variation (left panel) and its strength, which is the ratio between the instantaneous SFR and the SFR before the burst or quenching (right panel). In both panels, the solid line represents the results obtained when the full observed UV–mm SED is fitted and the dashed line shows results from when no FIR data are used for the fit.