Comparison of fit parameters with equal SU start vector and stochastically varied elements. The same formalism as in Fig. 7. In the bar graphs, the fitted parameters, x_i, are compared with the true parameters, x_i,tr (gray). For each SU vector, 1,000 fits were performed. The results for the successful_pΔMSE fits are shown. All parameters are determined reasonably though no bias was introduced by specific start vectors. The mean relative standard deviations σ_i,rel of 1,000 fits, ipr_i,1000 (Eq. 11), below the bar graph indicates the relative errors of each parameter. The ochre lines and numbers right specify the overall ipr_i,1000 value for each model and the dashed red line the level of 0.1, i.e., the 10% error.