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 CdTe
Value
Unit
Printed
Reading
Method (class, basis)
Composition
Scatter
Conversion
Effective
-100.708
kJ/mol (basis unstated)
5.000e-4
7.8 (model_calculated, calibrated)
7.8
-100.663
kJ/mol (basis unstated)
5.000e-4
7 (unknown, calibrated)
7
Sources
Yang Jianrong, N.J. Silk, A. Watson, A.W. Bryant, B.B. Argent, Thermodynamic and phase diagram assessment of the Cd-Te and Hg-Te systems, Calphad 19, 399-414 (1995). doi:10.1016/0364-5916(95)00038-g