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 MoNi8
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-4.44
kJ/mol (basis unstated)
0.005
31.43 (dft, calibrated)
31.43
-4.44
kJ/mol (basis unstated)
0.005
31.43 (dft, calibrated)
31.43
Sources
S.H. Zhou, Y. Wang, C. Jiang, J.Z. Zhu, L.-Q. Chen, Z.-K. Liu, First-principles calculations and thermodynamic modeling of the Ni–Mo system, Materials Science and Engineering: A 397, 288-296 (2005). doi:10.1016/j.msea.2005.02.037