Methodology for PCF Calculations of Lubricants, Greases and other Specialties
Reliability (R)
The activity data is fully based on measurements at relevant production sites. The results have been verified.
Activity data is partly based on assumptions, such as simplified process calculations or non-verified assumptions.
The activity data is based on non- qualified estimates.
As other upstream and downstream industry-specific guidelines are using 5 instead of 3 different DQI level, we recommend the LCA practitioners of the lubricant manufacturer to translate those as follows:
• DQR 1–2→ UEIL/ATIEL DQR = 1 • DQR 3→ UEIL/ATIEL DQR = 2 • DQR 4–5→ UEIL/ATIEL DQR = 3
3.1.3 The data quality rating (DQR)
In addition to assessing the data quality, the total data quality rating (DQR) of the PCF may be calculated and reported. TheDQR aims at providing quantitative information on the overall quality of the data used and the resulting PCF. The DQR of a PCF for a lubricant or other speciality is formed by considering the data qualities of the unit process itself and the upstreamvalue chain.
The DQR of the unit processes in the foreground system is based on the three mandatory up to five including the optional two data quality criteria (cf. Section 3.1.2). An example including the five data quality indicators is shown in the formula below:
DQRunit process = TeR + GeR +TiR + C+ R 5
Subsequently, the total DQR, meaning from cradle-to-(outbound)-gate, of a PCF is calculated from the sum of the PCF-based shares of the individual DQRs of the inputs and the unit process itself, as specified in the formula below:
DQRtotal =
∑i(DQRinput i ∙ PCFinput i ∙ ConsumptionAmountinput i) PCFtotal
+ DQRunit process ∙ PCFunit process PCFtotal
An example of the DQR calculation is shown in the following Table 4. Assuming a lubricant product has two inputs, for instance, one raw material input and one utility input, the information on the consumption amount, PCF and total DQR of both inputs need to be collected individually. Moreover, the PCF of the unit process operated by the lubricant manufacturer, as well as the DQR of the unit process need to be assessed. An example for this data collection is given in Table 4. In the next step, by
Version 1.2, 15.10.2025 © ATIEL and UEIL Page 19 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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