Fromtop to bottom, empirical to theoretical mass-loss rates ratio, in logarithmic scale, as a function of effective temperature for the OB supergiants sub-sample. Empirical mass-loss rates correspond to the Ṁ_max derived in this work. Theoretical mass-loss rates, , correspond to the mass-loss rates computed via recipes from V00 & V01 for different definitions of the temperatures of the jumps (see Sect. 5.2); top: Geneva approach, middle: MESA approach, and bottom: fixed-jumps approach (see Sect. 5.2). Different colours indicate at which side of the bi-stability jumps the sources are located. Arrows and symbols as in Fig. 4.