Tutorial: Creating Parameters in openLCA

Parameters

- useful for sensitivity analysis
- useful for preliminary data: data can easily be changed at the end of a study
- different input values can create different versions of the life cycle
- parameters reduce the likelihood of calculation errors

- parameters can be used instead of concrete values for inputs/outputs
- Define parameters as simple values, formulas or complex functions
- one parameter can refer to others -- dependent parameters; loops not allowed
- parameters can overwrite each other
- available on different levels i.e. process, product system, project, impact method, database
- local and global parameters possible
- the amount of parameters is theoretically unlimited

- Parameter names…
… must be one word.
… cannot contain special characters.
… cannot have more than 255 characters.
- Parameter formulas…
… can contain single values, simple equations, or complex functions including logical expressions
… do not contain units, so please add them in the comment field
… cannot have more than 255 characters.
...must use a point instead of commaas a decimal
- To check formulas you can use the formula interpreter to find errors


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[brunosbampato]

It helped me a lot, but PAY ATTENTION: AFTER CREATING PARAMETERS IN A PROCESS, YOU MUST SAVE IT BEFORE CREATING THE PRODUCT SYSTEM. It's shown on the video, however I didn't realize how essential it is.

[LuisGeorge]

Excellent very clear congratulations you are very helpful

[malvinnadan]

this helps alot in understanding the openLCA. can you upload a video in doing an LCA for incineration of MSW for power generation.

[caascade]

hello
thank you for your videos. I cannot find Part II of "Case Study using ecoinvent.3.1". However in this video I can see that you finished the case study (processes "Case 1", "Case 2"....etc). Could you tell me where I can find it please ?

[ssong]

Hi, I am new to openLCA and i was trying to download dataset form openLCA nexus but i could not access the website. Chrome says it takes too long to respond. May I Know how to solve the problem?

[nlis]

Is there a way to link the value of such a parameter to a value in an external file? say an .xlsx or .txt file? I would like to be able to asses the impact of amounts of materials calculated through a model in different software.

[emanhassan]

what are the global parameters, we"ve already changed and create different parameters

[emanhassan]

The links in the description don't work