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Table 2 Matrix for assessing data quality of datasets as proposed in the ILCD Handbook in italic the sector-specific refinements/judgements, leading to the definition of DQI ranges

From: Method applied to the background analysis of energy data to be considered for the European Reference Life Cycle Database (ELCD)

Indi-cator Subquality parameters Rating
1 (Very good) 2 (Good) 3 (Fair) 4 (Poor) 5 (Very poor)
TeR Expert judgement (technology mix (t.mix)) modelled as the t.mix very similar to the t.mix similar to the t.mix different to the t.mix totally different to the t.mix or not assessed
GR Expert judgement (share of referenced countries (r.c.)) Fulfil totally the share of r.c. Fulfil very similarly the share of r.c. fulfil similarly the share of r.c. Fulfil differ-rently the share of r.c Fulfil completely different the share r.c.
TiR Expert judgement (defined time (d.t.) on data inventory) All the data sources refer to d.t. The majority of the data sources refer to the d.t. At least half of the data sources refer to the d.t. Less than half of data sources refer to the d.t. None the data sources refer to the d.t.
C No. of impact categories weighted on% of elementary flows 15-16 impact categories 12-14 impact categories 8-11 impact categories 5-7 impact categories ≤5 impact categories
P Expert judgement precision/uncertainty (p/u) of data sources Very low u. and/or very high p. Low u. and/or high p. Fair u. and/or fair p. High u. and/or low p. Very high u. and/or very low p.
M expert judgement (system boundaries, multifunctionality and EoL) based on the situation (European Commission JRC, Institute for Environment and Sustainability 2010a), completion (C.) degree all LCA stag-es, allocation procedures. C. in a very high degree Most relevant LCA stages. allocation procedures. C. in a high degree Sufficient LCA stages. allocation procedures. C. in a suffi-cient degree Sufficient LCA stages. allocation procedures. C. in a low degree Not sufficient LCA stages. No allocation procedures (multi-functionality not solved according to the situation) C. in a low degree