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 Fe56.24Sn28.13Zr15.63
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-18.146
kJ/mol-atom
5.000e-4
3.9 (model_calculated, calibrated)
3.9
Sources
Paul Lafaye, Caroline Toffolon-Masclet, Jean-Claude Crivello, Jean-Marc Joubert, Thermodynamic modelling of the Fe–Sn–Zr system based on new experiments and first-principles calculations, Journal of Alloys and Compounds 821, 153200 (2020). doi:10.1016/j.jallcom.2019.153200