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EcoSpold 2 · Calculation comparison

ecoinvent 3.8 cut-off, mineral resources

A comparison of published impact results with VoLCA calculations from the same source data and the publisher’s impact factors. Points on the diagonal agree.

Engine version
volca 0.14.0 (bd7e64a, v0.14.0, linux)
Measured on
Comparison measurements and reference
Databaseecoinvent 3.8 cut-off
Source formatEcoSpold 2
Impact method collectionecological scarcity 2013
Impact categorymineral resources
UnitUBP
Activities compared18,274
Median ratio (VoLCA / published)1.0000
Comparison band1%
Activities outside the band262
Share outside the band1.43%
VerdictAgrees: meets the agreement a release is held to
Points drawn2,014
Largest relative deviation+950,290.67%
Activity with largest deviationspodumene production
Published referenceecoinvent 3.8_cutoff_cumulative_lcia_xlsx.7z
ecoinvent 3.8 cut-off, mineral resources
Each point is one activity: what ecoinvent 3.8 cut-off published for mineral resources (UBP), against what VoLCA computes from the same EcoSpold 2 source under the publisher's own ecological scarcity 2013 factors. The black line is equality and the grey band is 1%. 18,274 activities were compared; 262 fall outside the band, more than a picture can hold, so 1,828 of the 18,274 are drawn, evenly spaced over the published value whichever side of the band they fall, and the 186 of the 200 farthest from equality that this walk missed are added. Where several fall on one spot, at most three markers are drawn there, since a fourth would not darken it. Median ratio 1.0000, 1.43% outside the band. This meets the agreement a release is held to: at most 5% of activities outside the band and a median ratio inside it.