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Hey, i´m trying to analyse the production of a scooter. This includes production processes like drilling, welding, and so on. I´m using ecoinvent 2.2!

Firstly, i choose the material, aluminium, in a certain amount with the unit "kg". Now i do have the guideline, that the production process "extrusion" has to be used. When adding this process to the input list, i have to insert a value with unit "kg". Now my question: Do the values for the weight (once because of the material, once because of extrusion) appear twice in the input list?

Second question: when using the process "drilling" i have to add a value with unit "kg" too. Is this the weight of the removed material? And if this is the case, has this amount to be considered as material waste in the output list?
in openLCA by (150 points)

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