A schematic of the curve  [x(λ),y(λ)]  and the maximum compatibility estimate (the point closest to the new origin at the intersection of the dotted lines). The dashed line corresponds to a case with closely compatible data sources, while dot-dash indicates a case with systematic errors in models and/or data. The weight parameter λ for data mode 2 increases from left (λ = 0) to right (λ = ∞) on a curve.