Visualization of the solution migration across parameter space. Panels (a) and (c) show the recovered-to-input ratios for the four parameters (n_e, T_e, c(Hβ), R_V) in ratio space for noise-free and 0.1% line measurement uncertainties, respectively. Panels (b) and (d) show the corresponding distributions projected onto the (n_e, T_e) plane. Each point corresponds to an independently optimized solution, and the gray arrows connect the true input parameters to the recovered solutions.