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 Co2Ti
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-34.1
kJ/mol (basis unstated)
5.000e-4
10.5 (unknown, calibrated)
10.5
-32.2062
kJ/mol (basis unstated)
5.000e-5
11.7 (model_calculated, calibrated)
11.7
Sources
Liying Wu, Yinping Zeng, Yafei Pan, Yong Du, Yingbiao Peng, Han Li et al., Thermodynamic description and simulation of solidification microstructure in the Co-Ti system, The Journal of Chemical Thermodynamics 142, 105995 (2020). doi:10.1016/j.jct.2019.105995