Estimates and 95% confidence intervals of a 100 mm gauge block for various adjustment procedures. The graph shows the uncertainty bars x _j  ± 2u _j for the input uncertainties u ₀, the first set of uncertainty bars in each group, and for the adjusted uncertainties u from the Birge, second set, Mandel-Paule (M-P), third set, steepest decent (S-D), fourth set and minimum relative entropy (DKL) procedures, fifth set. The horizontal lines are the weighted means determined from the input uncertainties (solid red), steepest descent (blue dashed) and minimum relative entropy (black dotted).