Components kept separate, in the value's unit (literature SCHEMA.md, UNCERTAINTY_CALIBRATION.md): effective = max(sqrt(max(printed, reading, method)^2 + composition^2 + conversion^2), scatter). The method floor is the robust between-study scatter of the method class in ORCHID (calibrated) or a documented prior; printed values and printed uncertainties are unchanged.
Uncertainty budget of the literature values of Au2La
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-81.5
kJ/mol-atom
0.05
8.395 (dft, calibrated)
8.395
Sources
H.Q. Dong, X.M. Tao, H.S. Liu, T. Laurila, M. Paulastro-Kröckel, Thermodynamic assessment of Au–La and Au–Er binary systems, Journal of Alloys and Compounds 509, 4439-4444 (2011). doi:10.1016/j.jallcom.2011.01.072