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 AlV3
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-13.03
kJ/mol (basis unstated)
0.005
33.58 (dft, calibrated)
33.58
-9.97
kJ/mol (basis unstated)
0.005
33.58 (dft, calibrated)
33.58
-9.13
kJ/mol (basis unstated)
0.005
33.58 (dft, calibrated)
33.58
Sources
Alexandre Berche, Philippe Jund, Ab initio description of the different phases in the Al-Fe-V system: Structure, magnetism and thermodynamics, Computational Materials Science 149, 28-36 (2018). doi:10.1016/j.commatsci.2018.03.008