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 AlLi2Zr
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-3.8946
kJ/mol (basis unstated)
5.000e-5
15.6 (model_calculated, calibrated)
15.6
-3.4662
kJ/mol (basis unstated)
5.000e-5
33.58 (dft, calibrated)
33.58
Sources
Zhaohui Long, Dongyu Cui, Hongxing Hu, Zhi Li, Fucheng Yin, Touwen Fan, Thermodynamic Modeling of the Al-Li-Zr Ternary System, J. Phase Equilib. Diffus. 41, 623-641 (2020). doi:10.1007/s11669-020-00827-z