Comparison of the values for six parameters of the best-fit models and their values estimated by CIGALE from the mock data based on the best-fit models. The mock results of the dust attenuation, the stellar mass and the SFR are scattered approximately around the best-fit parameters (correlation coefficient r > 0.9), indicating that they are well constrained by the SED fitting. The burst fraction f_burst and the burst age t_burst are weakly constrained.