Methodology for PCF Calculations of Lubricants, Greases and other Specialties


inserting the collected data into the formula, the total DQR of the lubricant’s PCF is calculated as shown in the formula below.


Table 4: Example values to calculate the total DQR of a PCF. PCFinput


Consumption Amount


Input 1 Input 2 Unit process


0.5 kg/kg product


0.7 kg/kg product


3 kg CO2eq/kg 4 kg CO2eq/kg


1 kg CO2eq/kg product


PCFunit process DQRinput i


DQRunit process


2.5 1.2 1.5


DQRtotal =


2.5 ∗ 3 kg CO2eq kg


∗ 0.5 kg kgproduct


+1.2 ∗ 4 kg CO2eq kg


5.3 kg CO2eq kgproduct


∗ 0.7 kg kgproduct


+


1.5 ∗ 1 kg CO2eq kgproduct


5.3 kg CO2eq kgproduct


= 1.62


Calculating the DQR can be difficult if the individual DQRs of the data used are not provided with the PCF data. To address this issue, a default DQR value of 3 (cf. Section 3.1.2)may be assigned to inputs. This approach represents a conservative calculation of the DQR.


When reporting DQRs, a qualitative explanation of the total data quality of the PCF should be provided alongside the quantitative DQR. This ensures that special cases are reflected, which may not be accounted for in the DQR calculation. For instance, if the dataset used to represent a unit process input has a high DQR but is used as a proxy by only reflecting a comparable unit process input and not the specific input is considered, this should be explained in the qualitative description of the PCF's total data quality.


Cut-offs


When calculating a PCF, it is necessary to include all processes, flows and activities that are linked to the product system as defined by the system boundary Table 1 (cf. Section 2.3.3). Nevertheless, the number of unlimited processes linked to the product system makes the collection of all data unfeasible, thus following the cut-off criteria shall be applied:


Version 1.2, 15.10.2025 © ATIEL and UEIL Page 20 of 40 This document is a controlled document only in electronic form. Printed versions or copies are not subject to change service


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