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 CrNb2
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
75.33
kJ/mol (basis unstated)
0.005
11.79 (dft, calibrated)
11.79
76.31
kJ/mol (basis unstated)
0.005
11.79 (dft, calibrated)
11.79
76.52
kJ/mol (basis unstated)
0.005
11.79 (dft, calibrated)
11.79
Sources
J. Pavlů, J. Vřešt’ál, M. Šob, Re-modeling of Laves phases in the Cr–Nb and Cr–Ta systems using first-principles results, Calphad 33, 179-186 (2009). doi:10.1016/j.calphad.2008.04.006