How can i justify which general basic uncertainty i enter in the pedigree matrix. I am aware of the ones for the individual categories, such as (reliability,completeness etc.), but I can still enter a general basic uncertainty at the bottom, at least for the Ecoinvent database, I don't know exactly, for example, if I enter the number 20, how I can justify that.
Can you tell me?
for example, if i leave the one in, the standard deviation is very small, which does not make sense to me with the processes i have created myself, but on the other hand, i can't judge at all which number would be better like 20.