Histograms of the five quality indicators described in Sect. 3.2.5, each connected to a physical property, as indicated in the label of each panel. All histograms combine the information of all the stars with reliable estimates of T_eff and log 𝑔. The gray bins correspond to values within 3-σ after applying an iterative clipping until convergence is achieved, while the red bins correspond to the clipped values. The median and 3-σ values are indicated in the figure with vertical and dash-dotted blue lines, respectively. The associated values are shown in the legend. For the panel associated with the wind strength, the x-axis extends to significantly higher values than for the others.