Exemplification of how the dust mass completeness is computed in the redshift bin 1.6 < z ≤ 2.4 (Sect. 6.1). The diagonal shaded areas represent tracks of the N2GN SED models, given the minimum and maximum M_dust/L₈₅₀ ratios in the sample. The vertical dashed line is the 1.2 mm flux limit of the survey, and the horizontal dashed line is the corresponding mass maximal completeness threshold. The dotted horizontal lines mark the boundaries of an example mass bin, in which the hatched area would contain the sources missed by the flux cut.