hi,
i am using umberto nxt lca and would like to incorporate some kind of scenario analysis into my model:
let's say there is only one main process which yields one type of material. in scenario A, i would like to consider this material as a waste flow (leaving the system) and in scenario B, i would like to apply some further processing. Hence, the main process needs two exit flows: One flow in case the material leaves the system (scenario A) and one leading to another process (scenario B). In scenario A, all material leaves the system (99 kg in the following example). In scenario B, all material serves as an input for another process. my idea was to create a net parameter (e.g. "PARA", =0 for scenario A; =1 for scenario B) and to use functions to define the respective flow leaving the main process:
Flow leaving the system: IF(=(PARA,0),99,0) <<--scenario A
Flow leading towards further processing IF(=(PARA,0),0,99) <<--scenario B
However, I cannot use such kind of scenario modelling because umberto does not accept coefficients that are equal to 0, which is the case as in either scenario, one flow equals 0.
How can i avoid this or change my model to incorporate scenario modelling?
(I could use 0,000000001 instead of 0. however, i prefer a "clean" solution)
my model involves several scenarios and it is hence considerably inconvenient to creat a model for each scenario.
Your help is very appreciated!
Thanks a lot
