Predicted vs catalogued Gaia DR3 summary statistics for known binaries. The predictions are based on forward modelling of their orbital parameters. Top panel: Comparison between predicted and catalogue values of the astrometric goodness of fit of the single-star astrometric solution, ruwe, for binaries with published orbital solutions. Bottom panel: Predicted vs observed RV errors for spectroscopic binaries (SB1) in Gaia DR3. In both plots the blue line shows the median trend, while the dashed blue lines indicate the 16th and 84th percentiles. The 1:1 relation is marked in black. The lower subpanels show the logarithmic residuals between observed and predicted values; the side histograms illustrate their normalised distribution. The mean bias (μ) and scatter (σ) of the residuals are indicated.