Top: normalized distribution of the NLTE corrections for 16 individual Cr I lines and the mean NLTE corrections of all their possible subsets. Bottom: Illustration of our criterion to assess the reliability of average NLTE corrections. If the line-by-line NLTE value falls within the risky area (orange), applying the average NLTE correction leads to a larger offset compared to adopting the LTE value. The percentages shown correspond to the case where 2σ = |ΔNLTE|/2.