Relative uncertainty on DL07 free parameters, as obtained with the rest-frame simulation. For simplicity, we show only the case with α = 2, U_max = 10⁶, U_min = 0.7, q_PAH = 0.47, and γ = 0.01−0.11. The left diagram is obtained using ten photometric bands from 8 to 850 μm; the right diagrams uses only six bands between 8 and 250 μm. Left/right columns belong to the case obtained by removing long- and short-wavelength bands. Color coding is based on the average photometric uncertainty as computed over all available bands. See Sect. 6.1 for more details.