Impact of physical parameters in L_[O III]88/SFR vs. L_[C II]/SFR. The RECAL-L0025N0752 model predictions combined over all redshifts are shown as as grey dashed contours and the compiled observations as green dashed contours. The colour-coded rectangles represent the area between the 25th and 75th percentiles from low (blue) to high (red) values for the given parameters: gas mass (M_gas), stellar mass (M_*), metallicity (Z/Z_⊙), sSFR, ISRF, total hydrogen number density in the neutral clouds (n(H)_cloud), external pressure (P_ext), and radius of the neutral clouds (R_cloud). The solid black lines connect the median values of each rectangle. Detections and upper limits from Harikane et al. (2020) are shown as red filled dots and triangles (as in Fig. 15), respectively.