Comparison of the synthetic observations obtained from the disk models with the ALMA survey data with respect to the spectral indices (first panel) and dust-gas radii (second panel). The colored lines show evolutionary sequence of the models, starting at 0.2 Myr and ending at one Myr, with the latter point marked with a diamond. The blue scatter plots show observed quantities in Lupus cluster (Ansdell et al. 2018).