Not matcing required amounts in contribution tree and defined processes

Question

Hi,

I noticed that when I run my model and at the same time consider allocation for my model, the required amount shown in the contribution tree is not correct and is less than the actual amount I defined in my model. I know this is because of the allocation factor, but I cannot remove the allocation factor from my model. Do you have any idea how I can solve this? Currently, except for the total results, none of the results shown in the contribution tree are reliable for me because the required amount assigned to each process is not correct.

Thank you & Kind regards,

Mahsa

Answer 1

If I understand correctly, you want to see results (e.g. in the contribution tree) without allocation factors applied? If so, this can be achieved by setting allocation to "none" in the calculation properties:

Of course, I would say, also with allocation applied the result you see in the UI is "correct" (but reflecting the allocation).

Best wishes,

Andreas

Comments

Hi,
I do not see any option here to upload a screenshot.
My concern is that when the contribution tree shows the CO2 emission for a required amount that is not the input value I defined in the model, all the CO2 emissions of processes that end up in this final process are calculated wrong. e.g. the contribution tree is calculating  0.5 kgco2-eq for process number 5 for a required amount of 0.1 kg of an input. However, I have defined 0,17 kg of input in the process. I can adjust the co2 emission values for 0,17 kg. But, If I want to see the CO2 emission of process 4, this amount is calculated based on 0.5 kgco2-eq! The same applies to process 3, 2, and 1.  In my model, I have around 50 processes (with at least 4-5 flows in each process). For my project, I need to know the CO2 emission of most of processes.