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General comment Allocation rules used are made according to the ISO14044:2006. Allocation is avoided when possible and
when necessary, allocation is made based on physical shares and also avoiding double calculations.
Allocation is required if the production process produces more than one product and the flows of materials,
energy and waste cannot be separately measured for the studied product. Allocation used in generic data
sources follow the requirements of the EN 15804 -standard. It should be noticed that the allocation method
‘allocation, cut-off by classification’ has been used for Ecoinvent 3.8 data, which complies with EN 15804.
Avoiding allocation could not be avoided for following inputs as the information was only measured on
factory process level.
• Electricity consumption, heat production, transport fuels: only measured on factory
level.
• Energy-, mixed-, bio-, wood-, aluminium-, mixed metal-, cardboard-, plastic-, glass-,
hazardous-, construction waste: only measured on factory level.
• Water use: only measured on factory level.
• Ancillary materials; fluids, sandblasting sand and nitrogen: only measured on factory
level.
• Packaging materials: only measured on factory level.
The inputs were allocated to studied product based on production volume (mass in kilograms).
According to EN 15804, flows leaving the system at the end-of-waste boundary of the product stage (A1-
A3) are allocated as co-products. According to EN 15804, process that has a very low contribution to the
overall revenue may be neglected in co-product allocation. Materials sent for recycling or energy
recovery from manufacturing were not allocated, as it was estimated that their contribution to the
overall revenue is very marginal. No other allocations were made in this assessment.
This study follows the cut-off criteria stated in RTS PCR and EN 15804 -standard. This study does not exclude
anu components or processes which represent more than 1 % of the emissions of studied life cycle stage.
The study does not exclude any hazardous materials or substances.
Excluded processes and the criteria for exclusion are given in following table. Machines and facilities
(capital goods) required for and during production are excluded, as is transportation of employees.
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